In the given question you will find sentence, part of which are `"bold"`. compare the `"bold"` part of each sentence with the expressions (a),(b) and (c) given below. choose the expression which is an improvement upon the `"bold"` part. If none of the three expressions improves the sentence,then your answer is (d).
As John dived off the springboard, he was horrified to see that the water `"was drained from"` the pool the night before.

Options

A. was drained
B. had drained away
C. had been drained off
D. no improvement

Answer

C