Why did william marbury most likely support the judiciary act of 1789?

The correct answer is A). It allowed Marbury to take his case to Supreme Court.

Marbury v. Madison was a case of 1803.  

Before Thomas Jefferson took office on March 4, 1801, John Adams and Congress passed the Judiciary Act 1801. That Act created new courts, added more judges, and gave the president of the U.S. more control over the appointment of judges.  

William Marbury had been appealed to the court to solicit James Madison –Secretary of State- to deliver the documents he was asking for.

On February 24, 1803, the U.S. Supreme Court first declared an act of Congress unconstitutional and established the doctrine of judicial review.

i think the answer is b.