Why Did Jefferson Go Through with the Louisiana Purchase, Despite

Why did Jefferson go through with the Louisiana Purchase, despite the potential ideological problems it posed?

A) He was able to acquire investments from the Spanish to offset the high cost of the purchase.
B) Native Americans came forward to propose a treaty, which made him feel better about taking their lands.
C) The climate of the land being purchased made it not well suited economically for slavery, an institution he opposed.
D) He wanted to create a protective buffer separating the United States from the rest of the world.
E) It would help give the two political parties a shared goal since both saw the value in the acquisition of more land.