Question

napoleon was prompted to sell the louisiana territory to the united states because
a he had lost control of the revolution in france.
b he needed to raise money to wage war with great britain.
c he had received an unfavorable ruling at the congress of vienna.
d he feared us aggression should he fail to placate thomas jefferson.

Explanation:

Napoleon sold the Louisiana Territory to the US mainly to raise funds for his wars against Great Britain. He had already consolidated power in France (so A is wrong), the Congress of Vienna was after the Louisiana Purchase (so C is wrong), and it wasn't mainly about fearing US aggression (so D is wrong).

Answer:

B. he needed to raise money to wage war with Great Britain.