Mark the letter A, B, C, or D on the answer sheet to indicate the sentence that best combines each pair of sentences in the following questions

Mark the letter A, B, C, or D on the answer sheet to indicate the sentence that best combines each pair of sentences in the following questions. 

The field of Artificial Intelligence research was found at a workshop held on the campus of Dartmouth College during the summer of 1956.
A. was found      B. the      C. held on      D. field