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: How many songs are on the album that "Sometimes" is part of? Passage:Before recording her debut album, Spears had originally envisioned it in the style of "Sheryl Crow music, but younger [and] more adult contemporary". However, the singer agreed with her label's appointment of producers, who had the objective to reach a teen public at the time. She flew to Cheiron Studios in Stockholm, Sweden, where half of the album was recorded the spring of 1998, with producers Max Martin, Denniz Pop and Rami Yacoub, among others. "Sometimes" was written by Jörgen Elofsson, and produced by Per Magnusson and David Kreuger. Spears recorded the vocals for the song in May 1998, at Cheiron Studios in Stockholm, Sweden. It was also mixed at Cheiron Studios by Martin. Esbjörn Öhrwall played the acoustic guitar, while bass guitar was done by Thomas Lindberg. Keyboards and programming was done by Kreuger, and additional keyboards by Magnusson. Background vocals were provided by Anders von Hoffsten. Spears also co-wrote and recorded a track called "I'm So Curious", produced by Eric Foster White, that was released as a B-side to "Sometimes". The track was recorded in 1997 at 4MW East Studios in New Jersey. "Sometimes" was released as the second single from ...Baby One More Time on April 30, 1999.
 Links: a. ...Baby One More Time (album) b. A-side and B-side c. Keyboard instrument d. Sheryl Crow

Output: a


Input: Consider Input: Question: Of the two educational institutions James Illingworth attended, what year was the oldest established? Passage:Educated at Wellington College, Berkshire, and the University of Leicester, Illingworth was commissioned into the Army Air Corps in 1989. He became commanding officer of No. 657 Squadron AAC in August 2001 and went on to be a staff officer in the Directorate of Joint Commitments at the Ministry of Defence in 2003, Deputy Commander, Joint Helicopter Command in December 2010 and senior military attaché at the British Defence Staff – US in Washington, D.C. in August 2013. He then became Deputy Commander, 1st (United Kingdom) Division in August 2016 and Commander, British Forces Cyprus in February 2017. llingworth was replaced by Major General Robert Thomson on 25 September 2019. Illingworth was appointed Director Land Warfare Centre in October 2019.
 Links: a. Washington, D.C. b. Wellington College, Berkshire c. British Defence Staff – US d. University of Leicester

Output: b


Input: Consider Input: Question: How long is the Yoro river? Passage:Kazusa was originally part of a larger territory known as , which was divided into "upper" and “lower” portions (i.e. Kazusa and Shimōsa) during the reign of Emperor Kōtoku (645–654). It was well-known to the Imperial Court in Nara -period Japan for its fertile lands, and is mentioned in Nara period records as having supplied hemp to the Court. Kazusa was divided into 15 counties, of which the four counties comprising the district of Awa were separated in 718 into a separate province. The exact location of the capital of Kazusa is not precisely known, but is believed to have been somewhere within the borders of the modern city of Ichihara, Chiba. The ruins of the kokubun-ji, or provincial temple, of Kazusa has been located in the Sōza district of Ichihara. The kokubun-ji was first excavated in 1949, and is on a plateau above the Yōrō River in close proximity to Tokyo Bay. The site is protected as a Designated Historic Site of Japan. However, the Ichinomiya of Kazusa Province is the Tamasaki Shrine in what is now the town of Ichinomiya, Chiba, on the opposite coast of the province.
 Links: a. Japan b. Yōrō River c. Tokyo Bay d. Yōrō River


Output: b