The Marbury v. madison decision was responsible for creating the judicial branch's power to:

its A or B

Explanation:

The U.S. Supreme Court case Marbury v. Madison (1803) established the principle of judicial review—the power of the federal courts to declare legislative and executive acts unconstitutional. The unanimous opinion was written by Chief Justice John Marshall.

Explanation:

i hope this helps

.elections are held to determine who serves in congress.