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.

Example Input: Question: Who are the members of the group who collaborated with other singers multiple times for Bob Wills is Still the King? Passage:And in any case, people in Texas came to identify with the song. The work of the Austin-based group Asleep at the Wheel helped to keep popular knowledge of Wills going, and they collaborated with Clint Black on a new version of "Bob Wills Is Still the King" on a 1999 tribute album Ride With Bob. Another recording of the song by Asleep at the Wheel, this time in collaboration with Waylon's son Shooter Jennings together with Randy Rogers and Reckless Kelly, appeared on the 2015 effort . The song itself is collected on several Jennings live sets, compilations, and box sets, including RCA Country Legends (2001 compilation, includes studio version),  Live from Austin, TX (recorded 1989, released 2006), and Nashville Rebel (2006 box set including studio version). Perhaps the most unexpected appearance was a performance by The Rolling Stones in Austin in 2006 during their A Bigger Bang Tour. Their arrangement featuring Ronnie Wood playing pedal steel guitar was captured on their 2007 The Biggest Bang concert DVD release.
 Links: a. Reckless Kelly b. Asleep at the Wheel c. Asleep at the Wheel d. Randy Rogers Band
Example Output: b

Example Input: Question: Which state where Peganum harmala is found is the most populous? Passage:It was first planted in the United States in 1928 in New Mexico by a farmer wanting to manufacture a dye called "Turkish red" from its seeds. From here the plant spread over most of southern New Mexico and the Big Bend region of Texas. An additional spread has occurred from east of Los Angeles in California to the tip of southernmost Nevada. Outside of these regions the distribution in the USA is not continuous and localised. As of 2019 it has been reported in southern Arizona (in at least 3 adjacent counties), northeastern Montana (2 adjacent counties), northern Nevada (Churchill county), Oregon (town of Prineville in the Oregon high desert) and possibly Washington. "Because it is so drought tolerant, African rue can displace the native saltbushes and grasses growing in the salt-desert shrub lands of the Western U.S."
 Links: a. Montana b. Churchill County, Nevada c. New Mexico d. Oregon
Example Output: c

Example Input: Question: How many people can Stamford Bridge hold at max capacity? Passage:The quarter-final draw also determined the teams' routes to the final, with Barcelona facing the prospect of meeting either Chelsea or Liverpool in the semi-finals. After a 3–1 win at Anfield, Chelsea qualified for the semi-finals with a 4–4 draw at Stamford Bridge. The semi-final first leg was played at the Camp Nou; although Barcelona enjoyed the majority of the possession, Chelsea's defence was resolute and they became the first side to keep a clean sheet in Barcelona in this season's competition, coming away with a goalless draw. Barcelona needed to avoid defeat to reach the final, but they found themselves a goal down within 10 minutes; after they failed to clear Frank Lampard's pass into the penalty area, Michael Essien fired a left-footed volley past Víctor Valdés into the roof of the net. The rest of the match continued much the same as the first leg, with Barcelona retaining most of the possession. Despite this, they found themselves guilty of several fouls, while Chelsea made four unsuccessful penalty appeals during the match. Meanwhile, Dani Alves received his third yellow card of the knockout phase, ruling him out of Barcelona's next match, and Eric Abidal was given a straight red card for a foul on Nicolas Anelka as the French forward was through on goal. However, television replays after the incident showed that there was little contact between Abidal and Anelka. Norwegian referee Tom Henning Øvrebø allowed a minimum of four minutes of injury time at the end of the second half; in the third of those four minutes – just when it looked like Chelsea were about to secure a repeat of the 2008 final – Messi played the ball across the edge of the penalty area to Andrés Iniesta, who shot just past Petr Čech's outstretched hand for the away goal that would send Barcelona to the final.
 Links: a. 2008 UEFA Champions League Final b. Eric Abidal c. Stamford Bridge (stadium) d. Stamford Bridge (stadium)
Example Output:
c