In this task, you're expected to write answers to questions involving multiple references to the same entity. The answer to the question should be unambiguous and a phrase in the paragraph. Most questions can have only one correct answer.

Q: Passage: Minnesota has some of the earth's oldest rocks, gneisses that are about 3.6 billion years old (80% as old as the planet). About 2.7 billion years ago, basaltic lava poured out of cracks in the floor of the primordial ocean; the remains of this volcanic rock formed the Canadian Shield in northeast Minnesota. The roots of these volcanic mountains and the action of Precambrian seas formed the Iron Range of northern Minnesota. Following a period of volcanism 1.1 billion years ago, Minnesota's geological activity has been more subdued, with no volcanism or mountain formation, but with repeated incursions of the sea, which left behind multiple strata of sedimentary rock.In more recent times, massive ice sheets at least one kilometer thick ravaged the state's landscape and sculpted its terrain. The Wisconsin glaciation left 12,000 years ago. These glaciers covered all of Minnesota except the far southeast, an area characterized by steep hills and streams that cut into the bedrock. This area is known as the Driftless Zone for its absence of glacial drift. Much of the remainder of the state outside the northeast has 50 feet (15 m) or more of glacial till left behind as the last glaciers retreated. Gigantic Lake Agassiz formed in the northwest 13,000 years ago. Its bed created the fertile Red River valley, and its outflow, glacial River Warren, carved the valley of the Minnesota River and the Upper Mississippi downstream from Fort Snelling. Minnesota is geologically quiet today; it experiences earthquakes infrequently, and most of them are minor. 
Question: What is the name of the area in Minnesota was not covered by massive ice sheets?

A: the Driftless Zone.
****
Q: Passage: Another letter to The New York Times blamed the shark infestation on the maneuvers of German U-boats near America's East Coast. The anonymous writer claimed, "These sharks may have devoured human bodies in the waters of the German war zone and followed liners to this coast, or even followed the Deutschland herself, expecting the usual toll of drowning men, women, and children." The writer concluded, "This would account for their boldness and their craving for human flesh."Decades later, there is no consensus among researchers over Murphy and Lucas's investigation and findings. Richard G. Fernicola published two studies of the event, and notes that "there are many theories behind the New Jersey attacks," and all are inconclusive. Researchers such as Thomas Helm, Harold W. McCormick, Thomas B. Allen, William Young, Jean Campbell Butler, and Michael Capuzzo generally agree with Murphy and Lucas. However, the National Geographic Society reported in 2002 that "some experts are suggesting that the great white may not in fact be responsible for many of the attacks pinned on the species. These people say the real culprit behind many of the reported incidents—including the famous 1916 shark attacks in New Jersey that may have served as inspiration for Jaws—may be the lesser known bull shark."Biologists George A. Llano and Richard Ellis suggest that a bull shark could have been responsible for the fatal Jersey Shore attacks. Bull sharks swim from the ocean into freshwater rivers and streams and have attacked people around the world. In his book Sharks: Attacks on Man (1975), Llano writes,
One of the most surprising aspects of the Matawan Creek attacks was the distance from the open sea. Elsewhere in the book are accounts of well-documented shark-human interactions at Ahwaz, Iran, which is 90 miles (140 km) upriver from the sea. It may also be of interest to note that sharks live in Lake Nicaragua, a fresh-water body, and in 1944 there was a bounty offered for dead freshwater sharks, as they had "killed and severely injured lake bathers recently."
Ellis points out that the great white "is an oceanic species, and Schleisser's shark was caught in the ocean. To find it swimming in a tidal creek is, to say the least, unusual, and may even be impossible. The bull shark, however, is infamous for its freshwater meanderings, as well as for its pugnacious and aggressive nature."  He admits that "the bull shark is not a common species in New Jersey waters, but it does occur more frequently than the white."In an interview with Michael Capuzzo, ichthyologist George H. Burgess surmises, "The species involved has always been doubtful and likely will continue to generate spirited debate." Burgess, however, does not discount the great white:. 
Question: What is the full name of the book with accounts of well-documented shark-human interactions at Ahwaz, Iran?

A: Sharks: Attacks on Man.
****
Q: Passage: In March 1916, Thomson exhibited four canvases with the OSA: In the Northland (at that time titled The Birches), Spring Ice, Moonlight and October (then titled The Hardwoods), all of which were painted over the winter of 1915–16. Sir Edmund Walker and Eric Brown of the National Gallery of Canada wanted to purchase In the Northland, but Montreal trustee Dr. Francis Shepherd convinced them to purchase Spring Ice instead. The reception of Thomson's paintings at this time was mixed. Margaret Fairbairn of the Toronto Daily Star wrote, "Mr. Tom Thomson's 'The Birches' and 'The Hardwoods' show a fondness for intense yellows and orange and strong blue, altogether a fearless use of violent colour which can scarcely be called pleasing, and yet which seems an exaggeration of a truthful feeling that time will temper." A more favourable take came from artist Wyly Grier in The Christian Science Monitor:
Tom Thomson again reveals his capacity to be modern and remain individual. His early pictures—in which the quality of naivete had all the genuineness of the effort of the tyro and was not the counterfeit of it which is so much in evidence in the intensely rejuvenated works of the highly sophisticated—showed the faculty for affectionate and truthful record by a receptive eye and faithful hand; but his work today has reached higher levels of technical accomplishment. His Moonlight, Spring Ice and The Birches are among his best. In The Canadian Courier, painter Estelle Kerr also spoke positively, describing Thomson as "one of the most promising of Canadian painters who follows the impressionist movement and his work reveals himself to be a fine colourist, a clever technician, and a truthful interpreter of the north land in its various aspects".In 1916, Thomson left for Algonquin Park earlier than any previous year, evidenced by the many snow studies he produced at this time. In April or early May, MacCallum, Harris and his cousin Chester Harris joined Thomson at Cauchon Lake for a canoe trip. After MacCallum and Chester left, Harris and Thomson paddled together to Aura Lee Lake. Thomson produced many sketches which varied in composition, although they all had vivid colour and thickly-applied paint. MacCallum was present when he painted his Sketch for "The Jack Pine", writing that the tree fell over onto Thomson before the sketch was completed. He added that Harris thought the tree killed Thomson, "but he sprang up and continued painting". 
Question: What is the last name of the person among whose best works are Moonlight, Spring Ice, and The Birches?

A:
Thomson.
****