Answer:
C. The salutary Acts
Explanation:
Salutary was Britain's unofficial policy, initiated by prime minister Robert Walpole in the year 1607 to 1763 , to relax the enforcement of strict regulations, particularly trade laws, imposed on the American colonies late in the seventeenth and early in the eighteenth centuries.
This made almost all good imported into American colonies came into the colonies through the New England seaport.