Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.
They didn’t have the right visas. They couldn’t legally re-enter Thailand.
A.If they had had the right visas, they could have re-entered Thailand legally.
B.Had they had the right visas, they couldn’t re-entered Thailand legally.
C.Were they to have the right visas, they could re-entered Thailand legally.
D.If they had the right visas, they could re-entere Thailand legally.