Why was keeping a continental Army difficult under the articles of Confederation, leading to changes in the U.S. Constitution?

AStates of the smaller populations did not want an army

BStates with Larger population did not want an army

CCongress had to raise i'm national military separate from the states

DCongress could not force states to pay for troops needs

Verified Answer :

Keeping a Continental Army under the Articles of Confederation would have been difficult because there was a very weak Federal Government and very strong state government, making D the best choice, because Congress is Federal Government.

The congress could not force states to pay for troops needs.