In this task, you're given a question, a context passage, and four options which are terms from the passage. After reading a passage, you will get a brief understanding of the terms. Your job is to determine by searching and reading further information of which term you can answer the question. Indicate your choice as 'a', 'b', 'c', or 'd'. If you think more than one option is plausible, choose the more probable option to help you answer the question.

[Q]: Question: In which modern city is the castle where Della Torre was imprisoned located? Passage:Still in Montefiascone, near Viterbo, where he received Pope's appointment, Ottone marched to Arona on 1 April 1263, where he met several nobles fled by Milan for their opposition to Della Torre. Informed on Ottone's presence in Lombardy, Martino sent his troops to put Arona under siege. Ottone, who occupied the near Rocca of Angera, was forced to surrender on 5 May 1263. Returned in Montefiascone, Ottone lost his powerful ally Urban IV, died on October 1264. Della Torre, however, never get Raimondo formal appointment, and after Martino's death, the once loyal Pallavicino family switched side to Visconti, scheming the assassination of Paganino della Torre, podestà of Vercelli, on January 1266. In response, the new lord of Milan Napoleone della Torre executed 53 nobles, suspected of conjuring. This vicious act undermined Della Torre's grab on Milan, aggravated by Pope Gregory X, a Visconti of Piacenza, who in 1273 confirmed Ottone Visconti as legal Archbishop of Milan. Napoleone della Torre reacted exiling all noble families who don't supported him, causing the formation of an émigré coalition in Novara and Pavia. Using their financial and military support, Ottone's nephew Teobaldo Visconti led an army in Vercelli, occupying Castelseprio. Defeated by Torriani's forces, Teobaldo fled to Lurate, near Como, but after a battle in Gallarate, his last forces were defeated and he was beheaded by Napoleone della Torre in 1276. Ottone, returned in Lombardy in the same year, recruited his supporters near Desio, where he was canon, and after a bloody battle on January 1277, Visconti emerged victorius. Napoleone della Torre was imprisoned and tortured to death in Castel Baradello, while his brother Francesco was executed after the battle. Ottone entered in Milan on 22 January 1277, becoming the first Visconti de facto ruler of the city.
 Links: a. Castello Baradello b. Pope Gregory X c. Napoleone della Torre d. Battle of Desio
[A]: a


[Q]: Question: How old was Thomas Kenan's father when he died? Passage:Thomas Stephen Kenan (February 12, 1838 – December 23, 1911) was a Confederate soldier, and later a politician. His parents were Sarah Rebecca Graham and Owen Rand Kenan; he was the grandson of U.S. Congressman Thomas Kenan and great-grandson of Revolutionary War general James Kenan. He started his education in Duplin County, North Carolina at Old Grove Academy in Kenansville (the town was named for his great-grandfather in 1818). Later he spent a year at Central Military Institute in Selma, Alabama. Thomas spent his freshman year of college at Wake Forest in June. Thomas then transferred his sophomore year to the University of North Carolina, where he would graduate in 1857. He studied law for two years with Judge Pearson at Richmond Hill where he practiced law in Kenansville. After graduation and during the Civil War he became Captain of the Duplin Rifles in the Confederate States Army, elected lieutenant colonel of the 43rd North Carolina Infantry Regiment in April 1862, and was promoted to colonel later that year. He was wounded at the Battle of Gettysburg. While on an ambulance train, he and his older brother James Kenan were both captured; they were then imprisoned on Johnson's Island, Ohio. On March 22, 1865, he was released on parole but never switched sides during the war. On his return home he was elected to the state legislature from 1865 to 1867. Later that year he ran for Congress and lost. Not letting that defeat end his political career, he moved to Wilson, North Carolina, where he became mayor and was elected North Carolina Attorney General, serving from 1877 to 1885. In May 1868 he married Miss Sallie Dortch, but they had no children; Sallie died in 1916.
 Links: a. Owen Rand Kenan b. North Carolina c. North Carolina Attorney General d. Kenansville, North Carolina
[A]: a


[Q]: Question: How long had Sydney been established the year that Bob Heffron moved there to become the secretary of the New South Wales branch of the Federated Marine Stewards' and Pantrymen's Association of Australasia? Passage:In 1921, the Heffrons moved to Melbourne, Victoria. That same year in Victoria, Heffron was appointed an organiser for the Federated Clothing Trades of the Commonwealth of Australia and also joined the leftist Victorian Socialist Party. Later in 1921 he moved to Sydney, becoming the secretary of the New South Wales branch of the Federated Marine Stewards' and Pantrymen's Association of Australasia. As the union's state secretary, a role he would hold for ten years, he took a prominent role in maritime trade unionism in Sydney. In February 1924, when the Commonwealth and Dominion Line steamer Port Lyttelton was declared 'Black' by the Labor Council of New South Wales owing to various worker's disputes and the ship having been declared unseaworthy, Heffron and six other union representatives acted to advise members of the Seamen's Union to refuse to work on the Port Lyttelton. For this, in April the government of Sir George Fuller had Heffron and the six other unionists arrested on the charge of conspiracy to strike action. Although controversially refused bail by the trial judge, Heffron and his fellow defendants, represented by Richard Windeyer KC and H. V. Evatt, were found not guilty and released in July 1924 by the court, a verdict that had been returned by the direction of the judge. Later joining the Labor Party, at the time he showed himself to be a supporter of party leader Jack Lang, supporting Lang's successful motion at the 1923 state conference to readmit James Dooley to the party.
 Links: a. Sydney b. Port Line c. George Fuller (Australian politician) d. Labor Council of New South Wales
[A]:
a