B. An agreement to boycott all British imports and stop exporting to Britain and its colonies
This is the closest answer. The Continental Association was a response to the Intolerable Acts in an attempt to have it repealed. The goal was to create enough hardship for Britain that they would be persuaded to repeal the Acts.
Federal government has the highest authority
Federalism describes the system of shared governance between national and state governments. The states and the federal government have both exclusive and concurrent powers, which help to explain the negotiation over the balance of power between them.
D a dictator ship to overthrow the elected government