They actually don't know for sure what led to the decline but a lot of people believe that the Aryans invaded and conquered the Indus Civilization which would make sense because they were the next people group to live there. I hope this helps!
Answer:
The executive branch is in charge of carrying out and enforcing legislation. The president, vice president, Cabinet, executive departments, independent agencies, and various boards, commissions, and committees are all part of it.... Members of the Cabinet serve as counselors to the president.
Explanation:
The answer should be C.
Hope this Helps! :)