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.

Input: Consider Input: Question: Who did Bruce Herschenohn run against in his primary? Passage:In 1992 four-term incumbent Democratic Senator Alan Cranston retired, creating an open seat contest. In what was billed as the "Year of the Woman", Boxer beat fellow Rep. Mel Levine and Lieutenant Governor Leo McCarthy in the Democratic primary, winning 44% of the vote. In the general election, Boxer defeated Republican Bruce Herschensohn, a conservative television political commentator from Los Angeles, by 4.9%. A last-minute revelation that Herschensohn had attended a strip club at least partially affected the outcome. In 1998, she won a second term, beating sitting California State Treasurer Matt Fong by 10.1% of the vote. After facing no primary opposition in the 2004 election, Boxer defeated GOP candidate Bill Jones, the former California Secretary of State, by 20%. In 2010, Boxer defeated GOP candidate Carly Fiorina, former chief executive officer of Hewlett-Packard, by 10%.
 Links: a. 1992 United States Senate election in California b. Bruce Herschensohn c. Bill Jones (California politician) d. Leo T. McCarthy

Output: b


Input: Consider Input: Question: How old was Bartolome de las Casas when he was recalled from his mission? Passage:On his second visit to Guatemala, in 1537, friar Bartolome de las Casas, O.P. wanted to employ his new method of conversion based on two principles: 1) to preach the Gospel to all men and treat them as equals, and 2) to assert that conversion must be voluntary and based on knowledge and understanding of the Faith. It was important for Las Casas that this method be tested without meddling from secular colonists, so he chose a territory in the heart of Guatemala where there were no previous colonies and where the natives were considered fierce and war-like. Because of the fact that the land had not been possible to conquer by military means, the governor of Guatemala, Alonso de Maldonado, agreed to sign a contract promising that if the venture was successful he would not establish any new encomiendas in the area. Las Casas's group of friars established a Dominican presence in Rabinal, Sacapulas and Cobán, reaching as far as Chahal and including Cubulco. Through the efforts of Las Casas' missionaries the so-called "Land of War" came to be called "Verapaz", "True Peace". Las Casas's strategy was to teach Christian songs to merchant Indian Christians who then ventured into the area. In this way he was successful in converting several native chiefs, among them those of Atitlán and Chichicastenango, and in building several churches in the territory named Alta Verapaz. These congregated a group of Christian Indians in the location of what is now the town of Rabinal. In 1538 Las Casas was recalled from his mission by Bishop Francisco Marroquin who wanted him to go to Mexico and then on to Spain in order to seek more Dominicans to assist in the mission.
 Links: a. Alta Verapaz Department b. Bartolomé de las Casas c. Rabinal d. Cobán

Output: b


Input: Consider Input: Question: How long did the fight last in which Liu Bei and Cao Cao defeated Lü Bu? Passage:Liu Bei and his oath brothers Guan Yu and Zhang Fei swore allegiance to the Han Empire in the Oath of the Peach Garden and pledged to do their best for the people. However, their ambitions were not realised as they did not receive due recognition for helping to suppress the Yellow Turban Rebellion and participating in the campaign against Dong Zhuo. After Liu Bei succeeded Tao Qian as the governor of Xu Province, he offered shelter to Lü Bu, who had just been defeated by Cao Cao. However, Lü Bu betrayed his host, seized control of the province and attacked Liu Bei. Liu Bei combined forces with Cao Cao and defeated Lü Bu at the Battle of Xiapi. Liu Bei then followed Cao Cao back to the imperial capital, Xu, where Emperor Xian honoured him as his "Imperial Uncle". When Cao Cao showed signs that he wanted to usurp the throne, Emperor Xian wrote a secret decree in blood to his father-in-law, Dong Cheng, and ordered him to get rid of Cao. Dong Cheng secretly contacted Liu Bei and others and they planned to assassinate Cao Cao. However, the plot was leaked out and Cao Cao had Dong Cheng and the others arrested and executed along with their families.
 Links: a. Lü Bu b. Yellow Turban Rebellion c. Campaign against Dong Zhuo d. Battle of Xiapi


Output: d