The constitution’s necessary and proper clause is the source of which federal powers?

Explanation:

Proper and necessary clause is also called "elastic clause" Necessary and proper clause is found n Article 1, Section 8, clause 18 of US constitution. It allows the congress to pass laws that it considers necessary to carry out the the enumerated powers.  Elastic clause was added to the Constitution in 1787.

Enumerated powers are the powers that are granted to the federal government in Article 1, section 8 of the constitution, it includes the power to declare war, regulate commerce, coin money. establish post office and maintain armed forces.

King John the first

Explanation: