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.

Ex 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

Ex Output:
c

Ex Input:
Question: How many people live in the city where Kirdorf was born? Passage:Emil Kirdorf was born at Mettmann, Rhine Province. His father was a wealthy owner of a weaving mill. He had a brother named Adolf who would be his business partner during his adult life. Kirdorf volunteered a year in 1864 in Hamburg to work in an export enterprise. A year later, he worked in a textile company in Krefeld. The family's mill went bankrupt, mainly because of the management's refusal to introduce mechanical looms. Kirdorf therefore changed to mining industry in which he worked as an accountant. Following the Franco-Prussian War, he became director of Zeche Holland in 1871. Two years later, the entrepreneur Friedrich Grillo offered him the position of commercial director in the Gelsenkirchener Bergwerks-AG (GBAG) company. He became general manager of GBAG in 1893. He steered the company through the Long Depression of the 1870s, and held this position until 1926.
Links: a. Friedrich Grillo b. Management c. Mettmann d. Mettmann

Ex Output:
c

Ex Input:
Question: What role did Tobias play in her 2002 film? Passage:Prior to the launching of her next output, Tobias was cast on the screen in Krute radosti (2002) and Zostane to medzi nami (2003), respectively. Musically, she first returned on various artist compilation Tak to chodi (2003), produced by Michal Horacek. Following that, her second BMG album was issued on December 8, 2003. As with her previous release, neither Punto Fijo achieved a presence in the official albums charts. Nevertheless, its ballad repertoire with jazz, folk and ska-inspired music brought Tobias favorable feedback from music critics. In 2006, she appeared as guest on Horacek's follow-up project, Strazce plamene. The multi-platinum compilation and Andel Awards-nominee for the Album of the Year, included a solo track designed for herself by Petr Hapka "Na hotelu v Olomouci". The composition wouldn't crack the Radio Top 100 Oficialni, but her vocal performance has been generally viewed by many as the best of the set, and singer gradually started to gain her own fan base in the Czech Republic.
Links: a. Ballad b. Krute radosti c. Ballad d. Krute radosti

Ex Output:
b