Why Did Jefferson Overcome His Doubts About the Constitutionality of the Louisiana

Why did Jefferson overcome his doubts about the constitutionality of the Louisiana Purchase?

A) He found a passage in the Constitution that mentioned the purchase of territory.
B) An amendment was ratified permitting territorial acquisition.
C) He decided that a guarantee of land for American farmers was more important than a constitutional principle.
D) He realized that he would lose the next election without the additional votes from Louisiana.
E) All of these choices