9. which of the following is an interrogative sentence? a. they questioned where he was going. b. she isn't telling him where she is going. c. where are you going? d. don't go.

C. Where are you going? 

An interrogative sentence is one which asks a question. A question mark is used to close such a sentence. In one kind, the question is asked by varying the subject and predicate of a declarative sentence- either in tone of voice alone or in word-order. Such a question usually will be answered by yes or no.

Cwish this can you