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: When was the man whose name is used as the unit of radio wave frequency born?  Passage:A modulated radio wave, carrying an information signal, occupies a range of frequencies. See diagram. The information (modulation) in a radio signal is usually concentrated in narrow frequency bands called sidebands (SB) just above and below the carrier frequency. The width in hertz of the frequency range that the radio signal occupies, the highest frequency minus the lowest frequency, is called its bandwidth (BW). A given amount of bandwidth can carry the same amount of information (data rate in bits per second) regardless of where in the radio frequency spectrum it is located, so bandwidth is a measure of information-carrying capacity. The bandwidth required by a radio transmission depends on the data rate of the information (modulation signal) being sent, and the spectral efficiency of the modulation method used; how much data it can transmit in each kilohertz of bandwidth. Different types of information signals carried by radio have different data rates. For example, a television (video) signal has a greater data rate than an audio signal.
 Links: a. Data signaling rate b. Carrier wave c. Hertz d. Audio signal

Output: c


Input: Consider Input: Question: For how many years did the man serve as President that swept all five boroughs of NYC in 1964? Passage:Roosevelt won his home state by means of a dominance of the massively populated New York City area, performing even more strongly than he had in 1932. Roosevelt took over seventy percent of the vote in the boroughs of Manhattan, Brooklyn, and the Bronx, and took over sixty percent of the vote in Queens and Staten Island. For the era, this was an historically overwhelming victory for a Democratic presidential candidate in the five boroughs of New York City, and enough to easily secure a statewide win for Roosevelt. The emergence of the New Deal Coalition was at its peak in 1936, and made American cities with their powerful political machines core bases of support for the Democratic Party. The Great Depression had accelerated the process of urbanization of the Democratic Party which had begun with the election of 1928. Roosevelt’s landslide win in New York City was a fruit born by this process, and over the whole nation he achieved majorities in the largest cities totalling twice what Harding had achieved in 1920. 1936 was the third election in a row in which Democrats had won all five boroughs of NYC, following 1928 and 1932. After 1936, New York City would remain Democratic overall in every election that has followed, although no presidential candidate would sweep all five boroughs of NYC again until Lyndon Johnson in 1964. Partly as a consequence of this, FDR’s 1936 victory in New York State would also be the strongest statewide Democratic performance ever in terms of both margin and vote share until 1964.
 Links: a. Lyndon B. Johnson b. 1964 United States presidential election in New York c. Manhattan d. 1928 United States presidential election

Output: a


Input: Consider Input: Question: Was Jay-Z married to Beyonce when the album that contained his first top 10 single was released? Passage:The Brooklyn native rapper Jay-Z had success on the Billboard Hot 100 with singles from his debut studio album Reasonable Doubt. In 1997 he had success outside of the US with singles like "Sunshine" which peaked at number 25 in UK, 18 in Germany and 22 in NZ. His next single "Wishing on a Star" peaked at number 13 in UK being his highest peak on the chart until Hard Knock Life (Ghetto Anthem). The next single "The City Is Mine was the most successful single of In My Lifetime, Vol. 1. The album peaked at number 3 on the Billboard 200 and it received positive reviews from critics. In 1998 he released the smash hit singles "Can I Get A..." and "Hard Knock Life (Ghetto Anthem)" which peaked at number 19 and 15 on the Hot 100 and had wide success worldwide, too. The singles helped the album Vol. 2... Hard Knock Life to debut at number 1 on the Albums chart and selling over 5 million copies. Vol. 3... Life and Times of S. Carter had hits like "Jigga My Nigga" which peaked at number 1 on the Rap chart and #28 on the Hot 100. Hits like "Girl's Best Friend" and "Big Pimpin'" were released and the later peaked at #18 on the Hot 100 earning a platinum certification by the RIAA. His next album  was released shortly after Vol 3. The album sold 500k first week and had the hit "I Just Wanna Love U (Give It 2 Me)" which peaked at number one on the R&B/Hip-Hop chart being his first single to reach that peak. In 2001 he released his classic album The Blueprint which spawned his first top 10 single "Izzo (H.O.V.A.)" which was produced by Kanye West. The Blueprint peaked at number one on the Billboard 200 selling 400k, eventually reaching 2 million. The sequel followed in 2002 and had hits like "'03 Bonnie & Clyde" , "Excuse Me Miss" both peaking inside the top 10 on the Hot 100. The first single was his most successful single worldwide for Jay since "Hard Knock Life (Ghetto Anthem)". The album sold 500k but it received mixed reviews. The Black Album was released and had three hit singles and 2 of them were top 10. The album was considered a classic and Jay said it would be his last album. The project reached #1 on the albums chart and it won a Grammy for "99 Problems". Even though he said The Black Album would be his last album he released a collaboration EP with Linkin Park spawning a hit single which earned a Grammy.
 Links: a. The City Is Mine b. Jay-Z c. Kanye West d. Linkin Park


Output: b