What are the main reasons some executive departments are independent

In general, independent agencies are tasked with administering laws and federal regulations that apply to specific areas such as the environment, social security, homeland security, education, and veteran affairs.

Explanation:

it made them more prductive and efficent but with the change of polcies less and les got into the navy

either d or b, i'm not to sure. but my gut tells me it's prob going to be b