What is the main responsibility of executive branch agencies?
deciding what bills to submit to congress
carrying out programs assigned by congress
determining whether acts of congress are constitutional
approving agreements made by the president

Option 2: Carrying out programs assigned by Congress

One of the duties of the Executive Branch, whose power is vested in the President, is to enforce laws. It does so by giving the executive branch agencies the task of enforcing the laws enacted by Congress. Each agency is granted a specific budget each year to carry out the task.

In the United States, there are 15 executive agencies: Departments of Agriculture, Commerce, Defense, Education, Energy, Health and Human Services, Homeland Security, Housing and Urban Development, Interior, Justice, Labor, State, Transportation, Treasury and Veteran's Affairs.

b). (sounds as the best answer)