Which of the following law ideas might be created under the elastic clause
a: rules for approving foreign treaties
b: minimum gas mileage for vehicles
c: new equipment for armed forces
d: checklist before declaring war

I am not 100% sure on this, but I believe it is D.

elastic clause -- A clause within the United States Constitution that grants congress the power to pass whatever laws are deemed " necessary and proper " to help Congress carry out the enumerated powers.

One enumerated power that Congress has is the power to declare war.

This is why I am leaning towards D. checklist before declaring war.