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.
The book is interesting. It was bought last night.
A:
The book which was bought last night is interested.
B:
The book is interesting which was bought last night.
C:
The book which bought last night is interestingly.
D:
The book which was bought last night is interesting.