The Senate has the sole power to
a. declare war.
b.approve major presidential appointments.
c.regulate the District of Columbia.
d.issue patents and copyrights.
e. establish post offices and post roads.
I think it is b.
Since this is not my area of expertise, I searched Google under the key words "powers of US senate" to get these possible sources:
http://www.google.com/search?client=safari&rls=en&q=powers+of+US+senate&ie=UTF-8&oe=UTF-8
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.
You're correct! The Senate indeed has the sole power to approve major presidential appointments, including Cabinet members, ambassadors, and federal judges. To determine the correct answer, we can eliminate options a, c, d, and e since they are powers held by either the President or Congress as a whole.
To answer this question, you could refer to the United States Constitution. The Constitution outlines the powers and responsibilities of each branch of government. In this case, the particular power of the Senate to approve major presidential appointments is stated in Article II, Section 2, Clause 2 of the Constitution. By examining the relevant sections of the Constitution, you can find the accurate answer to this question.