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.

[EX Q]: Question: How long after Markos' mission to the Pope did Martin V pass away? Passage:He first appears in Constantinople in 1401, qualified as an oikeios of the emperor. In 1417 he was possibly sent on a diplomatic mission to the Venetians in the Morea. In 1422 and again in 1429 he was sent by Emperor John VIII Palaiologos as an envoy to the Ottoman Sultan Murad II. At the time he had the relatively lowly rank of protovestiarites, but was quickly promoted to protostrator and then to the senior rank of megas stratopedarches, which he held already during his mission in 1430 to Pope Martin V. During his return from the mission to the Pope, on orders from the Emperor, he raised Thomas Palaiologos to the rank of Despot in the Morea. He led two more missions abroad, one in 1433 to Pope Eugene IV, and one in 1438 to Venice.
 Links: a. Ottoman Empire b. Constantinople c. Pope Martin V d. John VIII Palaiologos
[EX A]: c

[EX Q]: Question: Who was the first to put forth the Voting Rights Act of 1965? Passage:In the United States, the Fifteenth Amendment to the United States Constitution, ratified in 1870 during the Reconstruction era, provided that "The right of citizens of the United States to vote shall not be denied or abridged by the United States or by any State on account of race, color, or previous condition of servitude." This amendment aimed to guarantee the right to vote to African Americans, many of whom had been enslaved in the South prior to the end (1865) of the American Civil War and the 1864-1865 abolition of slavery. Despite the amendment, however, blacks were disfranchised in the former Confederate states after 1877; Southern officials ignored the amendment and blocked black citizens from voting through a variety of devices, including poll taxes, literacy tests, and grandfather clauses; violence and terrorism were used to intimidate some would-be voters. Southern blacks did not effectively receive the right to vote until the Voting Rights Act of 1965.
 Links: a. Disenfranchisement after the Reconstruction Era b. Voting Rights Act of 1965 c. Reconstruction era d. African Americans
[EX A]: b

[EX Q]: Question: Was Ejei Khan from Chahar Borjigin? Passage:When the Northern Yuan Chahar Borjigin Mongol Khan Ejei Khan surrendered to the Qing, he was given the title of Prince of the first rank (Qin Wang, 親王), a title he held until his death in 1661, and inherited by his younger brother Abunai (阿布奈). Abunai openly showed his discontent toward the Manchu and he was put under house arrest in Shenyang by the Kangxi Emperor in 1669 and his imperial title / rank was given to his son Borni (布尔尼) in September of that same year. Borni (布尔尼) was careful to not show any sign of disrespecting the Qing Dynasty, but finally in 1675, he suddenly rebelled along with his younger brother Lubuzung (罗布藏), capitalizing on the Revolt of the Three Feudatories. However, they had made a serious miscalculation in wrongfully believing that other Mongols would join them, when in reality only three thousand Chahar (Mongols) joined the rebellion. It only took a single decisive battle on April 20, 1675 to defeat Abunai (阿布奈) and his followers, who were all killed subsequently in their retreat. The Qing Dynasty's punishment of the rebellion was very harsh: all royal males of Chahar (Mongols) were executed, including infants born to Qing / Manchu princesses, and all royal females of Chahar (Mongols) were sold to slavery except these Qing / Manchu princesses.
 Links: a. Shenyang b. Kangxi Emperor c. Ejei Khan d. Borjigin
[EX A]:
c