The President . . . shall have Power to grant Reprieves and Pardons for Offences against the United States, except in Cases of Impeachment." The power to pardon is one of the least limited powers granted to the President in the Constitution.
<em>A. Congress was denied power to regulate trade.</em>
Explanation:
The Articles of Confederation had many weaknesses, it did not give proper power to the national government, so they could not regulate trade, enforce laws, or tax citizens. Colonists were scared that if enough power got into the hands of the government, the same thing would happen with what happened with Great Britain. Although the national government had no judicial branch, would also be correct in this case, as the national government did not have enough power or resources to do so, the question states "mercantile laws", which have to do with trade. Congress did not have any power to regulate trade under the Articles of Confederation, as they hated how the British used to enforce laws on them about what they can and cannot trade, and who they can and cannot trade with.
United States was an agrarian-based nation. Prior to World War II, people were involved in agriculture than other existing industries. Technological improvements in farming introduced during the war years reduced farming dependencies on manual labor freeing people to move to the cities to find white collar jobs after the war.