I believe the answer is: A. a) in congressional committees
Editing bill falls under the authority of the legislative branch of the government. President and the Cabinets are part of the executive branch, so this eliminate option C and D.
The floor congress only discuss pending bills, not edit them. This eliminate option B.
<span>In the United States, a congressional committee is a sub-organization that handles specific committees. They monitor ongoing operations head by the government, identify issues that relate to the legislative view, and handle most work in considering and editing bills.</span>
