Question

why is the necessary and proper clause a source of ongoing debate? congress cannot agree on how broad its implied powers should be. the wording of the clause is often undergoing revision. the clause deals with implied powers that are ambiguously defined. the clause establishes reserved rights, which vary from state to state.

Explanation:

The Necessary and Proper Clause (Elastic Clause) relates to Congress's implied powers. Its ambiguity in defining the scope of these powers leads to ongoing debate. Congress disagrees on how far these implied powers extend, and the core issue is the vague definition of the implied powers themselves. The clause's wording is not frequently revised, and it does not establish state reserved rights (those are from the 10th Amendment).

Answer:

A. Congress cannot agree on how broad its implied powers should be.
C. The clause deals with implied powers that are ambiguously defined.