Why Is the Necessary and Proper Clause Often a Source

Why is the necessary and proper clause often a source of controversy and political disagreement?

A) Some argue that it grants too much power to the Supreme Court by giving it the power to declare state laws unconstitutional.
B) Some argue that the executive branch has abused its power through an overly broad interpretation of the necessary and proper clause.
C) Some argue that the U.S. Congress has abused its power through an overly broad interpretation of the necessary and proper clause.
D) Some argue that it makes the military too powerful without proper checks from civilian government.