Q: 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 after Nathaniel Treat's descendant passed away did Nathaniel marry Mary Parker? Passage:Treat was born in Frankfort, Maine on December 29, 1798. He was a descendant of Robert Treat. In 1823, Treat married Mary P. Parker. They had ten children, including Joseph B. Treat, who became a member of the Wisconsin State Senate and chairman of the Republican State Central Committee. Treat built sawmills, served as a bank president, and became involved in the lumber industry. His former home in Orono, Maine, now known as the Nathaniel Treat House, is listed on the National Register of Historic Places. In 1870, Treat moved to Monroe, Wisconsin, where he died on February 4, 1894. His grandson, Charles Treat, became a major general in the United States Army. Treat and his family were Universalists.
Links: a. Robert Treat b. Republican Party of Wisconsin c. Wisconsin State Senate d. Frankfort, Maine
A:
a