Why did the treaty that gave france control of louisiana alarm jefferson? a) jefferson was not sure how this agreement would effect america's ability to use the mississippi river as a trade route. b) france was declaring war on the united states. c) the french would not let americans use the river. d) france was planning on draining the river to build a railroad.

C. The French would no let Americans use the river is the correct answer.

Explanation:

Treaty of Paris gave England control of the Canada and Louisiana territory east of Mississippi to Britain. The rest of Louisiana was ceded to Spain and incorporates Spanish Louisiana into the Spanish empire. This treaty alarmed Jefferson because he was afraid that the french will not let the Americans use the river, the Mississippi river was important for bringing all the products from the interiors to the sea. He also wanted to expand the US territory westwards. Hence The Treaty of Paris alarmed Jefferson

1 and 2

explanation: