Answer:
"Though both the words underline suppression of the other, Colonialism is where one nation assumes control over the other and Imperialism refers to political or economic control, either formally or informally. In simple words, colonialism can be thought to be a practice and imperialism as the idea driving the practice."
Quoted from an online source
I DO NOT TAKE OWNERSHIP OF ANY OF THE TEXT IN QUOTATIONS!
A. He convinced The British Parliament to send more men and supplies to the colonies in North America
"<span>C. It had thin stone walls supported on the outside by flying buttresses" does not</span> apply to Gothic architecture, since the walls were often very thick.