Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
________ Charles Danvin _______ the Galapagos Islands, he might never have developed his theory of evolution.
A. Were; not to visit
B. Hadn’t; visited
C. Weren’t; to have visited
D. Had; not visited
Answer the question before viewing the answer below
Correct answer: D