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 won the second race that Sebastian Vettel participated in? Passage:Driving in place of Robert Kubica, Vettel made his début in with BMW Sauber in the United States Grand Prix; making him (at that time) the youngest points scorer in Formula One by finishing eighth in the race. His second race came with Scuderia Toro Rosso in the 2007 Hungarian Grand Prix and he stayed at Toro Rosso until the end of the season. Vettel won his first race at the 2008 Italian Grand Prix starting from his first pole, which remains Toro Rosso's only win. He then moved to Red Bull for the season and stayed at Red Bull until the end of the season. During his six years at Red Bull, he secured four championships, 38 wins, 44 pole positions and 65 podium finishes. Vettel's first championship came at the age of 23 years and 134 days in , becoming the youngest ever world champion; this was followed by three consecutive championships. , a winless season for Vettel, was his final year with Red Bull; he then joined Scuderia Ferrari. In his first year with Ferrari, he secured 3 wins, 1 pole position, and 13 podium finishes, going on to finish 3rd in the standings. In the season, Vettel had no wins with Ferrari and finished 4th in the standings. However, in he finished the season in second place with 5 victories. His Grand Prix victories is the third highest of all-time, only behind Lewis Hamilton's wins and Michael Schumacher at 91.
 Links: a. Red Bull Racing b. 2007 Hungarian Grand Prix c. Robert Kubica d. List of Formula One driver records

Output: b


Input: Consider Input: 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

Output: c


Input: Consider Input: Question: Which single from the album Hearsay was released last? Passage:On release, the album was received favourably by the majority of music critics. O'Neal's most commercially successful solo album, in the United States it went on to peak at number 29 on the Billboard 200 and number two on Top R&B/Hip-Hop Albums. The album was even more successful in the United Kingdom, peaking at number four and producing seven charting singles, including five top 40 hits. "Fake" peaked at number 33 on the UK Singles Chart; "Criticize" peaked at number four; "Never Knew Love Like This" at number 26; "The Lovers" at number 28; "(What Can I Say) To Make You Love Me" at number 27; "Sunshine" at number 72. Several remixes of the album's songs also charted: "Fake '88", (No. 16); "Hearsay '89", (No. 56). Two of the tracks, "Fake" and "Criticize", were also popular anthems in UK dance clubs. The album went on to be certified gold by the RIAA on October 20, 1987. In the UK, it sold more than 900,000 copies, being certified 3× Platinum by the BPI.
 Links: a. UK Singles Chart b. Criticize (song) c. Never Knew Love Like This d. Fake (Alexander O'Neal song)


Output: d