Hi,
I believe the answer is: A
Steering Committee: a committee that decides on the priorities or order of business of an organization and manages the general course of its operations.
Standing Committee: a permanent committee that meets regularly.
Ad Hoc Committee: A committee formed ad hoc to deal with the issue. Concerned or dealing with a specific subject, purpose, or end: The ad hoc committee disbanded after making its final report.
Special Committee:A select or special committee of the United States Congress is a congressional committee appointed to perform a special function that is beyond the authority or capacity of a standing committee.
Look at the definitions. Think about it.