Answer:
c. chief legislator
Step-by-step explanation:
The president has many roles that are official and unofficial. One of them is as chief legislator which means that the president can shape the policy as he/she can influence the topics the Congress discusses and the laws that can be passed. The president can asked the Congress to pass laws that are considered important and also has veto power which is that he/she can disapprove a law. Because of this, the presidential role that sets the overall congressional agenda is chief legislator.