The confirmation of Presidential appointments by the senate is part of the unique power possessed by Senate.
The unique power granted to the senate in this case also mean the non-legislative power granted by the constitution.
US Constitution grants some Non-legislative power to the Legislative branch and it includes:
Therefore, the Option B is correct since the unique power of the senate is also known as a non-legislative power.
Read more about non-legislative power
brainly.com/question/1618040