DIRECTIONS: in the following question, a part of sentence is bold. Below are given alternatives to the bold part which may improve the sentence. Choose the correct alternative. In case no improvement is required, choose “No Improvement” option.
What you have been doing since the workshop last month?

Options

A. a) have you done
B. b) you have done
C. c) have you been doing
D. d) No Improvement

Answer

C

Explanation

Structure of Interrogative sentence :
What have/has+ Subject +been + V-ing.
Hence, have you been doing is the right usage.