Whats the office of the judicial system?

U.S. Court?

Yes.

I just searched it up and it says it's U.S. Court but it doesn't give it as an answer choice.

What are your answer choices?

Reflecting Pool,Vietnam Veterans Memorial,White House,The Ellipse,Washington Monument,Bureau of Engraving and Printing,Union Station,Smithstonian Inst,Jefferson Memorial

I don't think any of those answers is correct.

How about the Justice Building?

Right.