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: Did the highest scoring fighter ace have any siblings? Passage:After a short rest, the 90th continued across the Moselle River to take Mainz, 22 March, and crossed the rivers Rhine, the Main, and the Werra in rapid succession. Pursuit continued to the Czech border, 18 April 1945, and into the Sudetes mountain range. The division was en route to Prague when they came upon the remaining 1500 emaciated prisoners left behind by the SS at Flossenburg concentration camp. Today, a memorial wall at the former camp honors the 90th as the liberators of Flossenburg concentration camp. A week later, word came that the war in Europe ended on 8 May 1945. On that same day, Erich Hartmann, the highest-scoring fighter ace in history, along with a squadron of the elite Jagdgeschwader 52 fighter wing (the highest-scoring fighter wing in history), surrendered to the 90th.
Links: a. Main (river) b. Jagdgeschwader 52 c. Prague d. Erich Hartmann
Example Output: d

Example Input: Question: When was the gunnery school David moved to in 1932 built? Passage:He was assigned as a midshipman on 1 May 1929 after finishing top of his class in five subjects. In 1930 he was assigned to the battleship Marlborough, part of the Third Battle Squadron; and the following year to the battlecruiser in September 1931 on which he served with fellow midshipman, and future vice admiral, Peter Gretton. While serving on the ship, Wanklyn was promoted to acting sub-lieutenant (the equivalent of an army second lieutenant) on 1 January 1932. Soon afterwards he moved to the naval gunnery school - HMS Excellent - at Whale Island, Portsmouth to learn more about naval navigation to qualify for his second ring at the rank of lieutenant. In February 1933 he moved to HMS Dolphin and was promoted to lieutenant on 1 February 1933.
Links: a. Excellent b. Battlecruiser c. Vice admiral d. Whale Island, Hampshire
Example Output: a

Example Input: Question: Who discovered the scrolls that supplanted the Nash Payrus as the oldest Hebrew manuscript? Passage:The Nash Papyrus is a collection of four papyrus fragments acquired in Egypt in 1898, inscribed with a Hebrew text which mainly contains the Ten Commandments and the first part of the Shema Yisrael prayer, in a form that differs substantially from the later, canonical Masoretic text and is in parts more similar to the chronologically closer Septuagint. It has been suggested that the text might have been the daily worship of a Jew living in Egypt at the time. The fragments comprise a single sheet and are not part of a scroll. The papyrus is of unknown provenance, although it is allegedly from Fayyum. The text was first described by Stanley A. Cook in 1903. Though dated by Cook to the 2nd century CE, subsequent reappraisals have pushed the date of the fragments back to about 150100 BCE. The papyrus was by far the oldest Hebrew manuscript fragment known at that time, before the discovery of the Dead Sea Scrolls in 1947.
Links: a. Septuagint b. Masoretic Text c. Egypt d. Dead Sea Scrolls
Example Output:
d