What are the purpose of committees in Congress?

a. aide presidential appointments
b. study on specific subjects
c. foster relationship between states
d. override vetoes

b. study on specific subjects

The purpose of committees in Congress is to study specific subjects and issues in-depth. Committees are responsible for reviewing legislation, conducting hearings, gathering evidence, and making recommendations to the full House or Senate. They allow lawmakers to specialize in certain policy areas and gather expertise on particular subjects.