instruction:
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.
question:
Question: What are earthwork mounds made of? Passage:Indigenous peoples inhabited Missouri for thousands of years before European exploration and settlement. Archaeological excavations along the rivers have shown continuous habitation for more than 7,000 years. Beginning before 1000 CE, there arose the complex Mississippian culture, whose people created regional political centers at present-day St. Louis and across the Mississippi River at Cahokia, near present-day Collinsville, Illinois. Their large cities included thousands of individual residences, but they are known for their surviving massive earthwork mounds, built for religious, political and social reasons, in platform, ridgetop and conical shapes. Cahokia was the center of a regional trading network that reached from the Great Lakes to the Gulf of Mexico. The civilization declined by 1400 CE, and most descendants left the area long before the arrival of Europeans. St. Louis was at one time known as Mound City by the European Americans, because of the numerous surviving prehistoric mounds, since lost to urban development. The Mississippian culture left mounds throughout the middle Mississippi and Ohio river valleys, extending into the southeast as well as the upper river.
 Links: a. Archaeology b. Collinsville, Illinois c. Earthworks (archaeology) d. Collinsville, Illinois
answer:
c


question:
Question: Who was the head of the Gambia when Cham Joof was born? Passage:Cham Joof was born on 22 October 1924 at 7 Griffith Street (Half-Die) in Bathurst now Banjul, the capital of the Gambia. He came from a Serer and Wolof background. He was the third child and the eldest son of Ebrima Joof (1887–1949) and Aji Anna Samba (1896 – 9 April 1977). On his father's side (the Joof family), he was a descendant of the Joof Dynasty of Sine and Saloum, and the Njie Dynasty of Jolof. On his mother's side, he was the great grand-nephew of Tafsir Sa Lolly Jabou Samba — a 19th-century Senegambian jihadist, military strategists and advisor to Maba Diakhou Bâ and one of the commanders of his army. Cham Joof was the elder brother of Gambian barrister Alhaji Bai Modi Joof.
 Links: a. The Gambia b. Joof family c. Njie d. Saloum
answer:
a


question:
Question: What is the name of the first track on the album of Quik's that was certified Gold in 1999? Passage:In 1998 Quik released Rhythm-al-ism his fourth studio album on Profile Records. This record was certified Gold in 1999, and contained the singles "Hand in Hand (featuring 2nd II None and El Debarge) and "You'z A Ganxta." It featured guest appearances by Nate Dogg, Snoop Dogg, AMG and Suga Free. That year he went on to produce for The Luniz, Shaquille O'Neal, Deborah Cox and Jermaine Dupri. He also produced on The Kingdom Come by rapper King Tee which ultimately never came out due to label problems. He also faced personal and professional tragedy when his nephew murdered his close friend and protégé Darryl Cortez Reed in 1998. In 1999, there was the release of Classic 220 by 2nd II None, in which Quik played a huge part. Production on Gap Band's Y2K: Funkin' Till 2000 Comz album, Snoop Dogg's No Limit Top Dogg,  and Deep Blue Sea (soundtrack). This was compounded by the death of another friend and rapper Mausberg, subsequently murdered in 2000. That year, saw the release of rapper Mausberg's album, and DJ Quik's Balance & Options. Also production with Whitney Houston, Erick Sermon, 8Ball & MJG, Xzibit and AMG.
 Links: a. Rhythm-al-ism b. Erick Sermon c. Classic 220 d. No Limit Top Dogg
answer:

a