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 The Continental Association was a response to the Intolerable Acts in an attempt to have it repealed.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.
"<span>D. More people turned to custom made goods and away from cheap, mass-produced items" is not true. In fact it was quite the opposite thanks to industrialization. </span>