What impact do you think the assassination of President Lincoln would have had on America given that it happened so soon after the first major American crisis, the Civil War?

Plz , ive been stuck on this forever. what action did president jefferson take to stop britain and france from seizing american merchant ships. a. he declared war on france. b. he called for increased tariffs on british and french goods. c. he called for embargo on all foreign trade. d. he declared war on britain.