Which of the following was the purpose behind the Necessary and
Proper Clause in Article 1 of the
Constitution?
A. The Constitution cannot be changed for any reason.
B. The Congress can create new laws as new issues
arise over time.
C. The president is the only person who can create
new laws.
D. The Supreme Court may create a new law if it is
needed for the country.

The Necessary and Proper clause was intended to allow Congress to decide whether, when and how to legislate for "carrying into execution" the powers of another branch, and at the same time intended to respect and reinforce the principle of separation of powers.

HOPE THIS HELPS!! :))

to act quickly in times of danger to the united states

because you have to act quickly if you want to live/survive.