In this question, sentence is given with blank to be filled in with an appropriate word. Four alternatives are suggested for question. Choose the correct alternative out of the four.
The minister ____ on the petition before it was taken up for discussion.

Options

A. could sign
B. signed
C. had signed
D. must sign

Answer

C

Explanation

For the two events of the past, the event that happens earlier, should be expressed in Past Perfect.
Hence, had signed ….. is the right usage.