A major weakness of the Articles of Confederation was that the Congress

a. was unable to raise armies.

b. had no power to impose taxes.

c. did not have authority to sign treaties.

d. could not declare war.

Option B, had no power to impose taxes is the right answer.

The colonies of the United States did not want to have a strong centralized government, because they did not want the government to become a tyranny. Hence, they did not even provide the national government with some very significant powers such as the power of issuing money, imposing taxes, enforcing laws etc.

The leaders of the colonies thought that the power accession would lead to the recolonization of the newly freed American territories. Hence, the Articles of Confederation did not provide the national government with sufficient authority to implement their laws. And this became a major weakness of the national government made under the articles of confederation.