D. Foreign policy was centralised under the federal government is the correct answer.
Explanation:
The articles of confederation had many weaknesses, and to get rid of those constitution was framed. Constitution created a stronger federal government and divided powers between the central and state government. The constitution also had checks and balances to prevent any one part of the government from becoming too powerful. It also gave central government with a executive and judicial branch. While under the Articles of Confederation congress could not collect taxes or enforce treaties, it made it difficult for the soldiers to fight the revolutionary war.
They first put tariffs on each other because trump did not like chinas way if handling this so he put a stop to some products heading to China. China responded by doing the same thing.
