Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.
The fire was brought under control thanks to the night watchman.
A. The nightwatchman must have caused the fire which was brought under control.
B. But for the nightwatchman, the fire would have been brought under control.
C. It the nightwatchman had not appeared, the fire would have been brought under control.
D. If it had not been for the nightwatchman, the fire would not have been brought under control.