You will be given a definition of a task first, then some input of the task.
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.

Question: How many years of age difference are there between the two candidates that Thompson lost to in 1948 and 1950? Passage:Thompson was a presidential elector for the 1948 presidential election. From 1949 to 1956, he was a member of the Democratic National Committee. In 1947, he was a candidate in for the United States House of Representatives from Wisconsin's 2nd congressional district in the special election following the death of Robert Kirkland Henry. He lost to Glenn Robert Davis. Thompson was twice an unsuccessful candidate for Governor of Wisconsin, losing to incumbent Oscar Rennebohm in 1948 and to Walter J. Kohler, Jr. in 1950, and was a delegate to the Democratic National Convention in 1952 and 1956. After serving as an alderman and city attorney in Stoughton, he was a member of the Assembly from 1953 until 1959, when he was elected to the Senate in a special election. He remained in the Senate until 1984.
Links: a. United States House of Representatives b. Robert Kirkland Henry c. Oscar Rennebohm d. Robert Kirkland Henry
Output:
c