Answer:
A) to interpret and apply the law
Step-by-step explanation:
To answer the question we can go back to the trias politica doctrine, or separation of powers. In this case the legislative branch (Congress), proposes and creates laws, the executive branch (President and his Cabinet) enforces these laws, and the judicial branch (Supreme Court and lower courts) interpret the law.
The actions described in B and C are done by the legislative branch, while the Cabinet advises the president on constitutional matters.