Why Did the British Crown Reserve the Right to Its

Why did the British Crown reserve the right to its "royal veto" of colonial legislation?

A) To prevent potential rebellion in the colonies
B) To prohibit colonists from participating in the slave or other trade without consent of the Crown
C) To protect the colonial economy from potentially harmful laws
D) To ensure that colonists did not pass laws that might interfere with the mercantile system
E) To remind colonists that the king was always in charge