Why did exports to america drop in 1775? during stamp act

i think this is the answer

in an effort to raise funds to pay off debts and defend the vast new American territories won from the French in the Seven Years’ War (1756-1763), the British government passes the Stamp Act on March 22, 1765. The legislation levied a direct tax on all materials printed for commercial and legal use in the colonies, from newspapers and pamphlets to playing cards and dice.

Explanation:

answer; i believe the correct answer is (favorable balance);