17.

Answer and Explanation

Your Answer is

Correct Answer is B

Explanation

According to the meaning of the sentence, it means "Hawaii became a state in 1959". Item B indicates that the preceding and following events occur simultaneously.

A item to become expresses the purpose, and the logic is wrong.

The attributive clause in item C modifies Hawaii. Since Hawaii is very clear, it is only right to use a non-limiting attributive clause here.

D item becoming means that it is becoming, this action is not continuous, so it is wrong.