Apresidential appointment is

a. by the house of representatives

b. by the senate
c. by a national election
d. by the head of agencies

A presidential appointment is confirmed by the Senate.

B

Explanation

Even though the President is the head of the government as well as the nation,  the Constitution has powers to limit the president.

The president can put forward nominations to various important positions but the Senate confirms the appointment after assessing.

Each state has 2 senators irrespective of population.

A presidential nomination is judged by the Senate by viewing the below mentioned three factors -  

·The significance of the position  

·Current political situation

·Implication of policies

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i hope this