What was Jefferson’s farming invention called ?

answer; i believe that the correct answer is (chronological order);

the monroe doctrine is the best known u.s. policy toward the western hemisphere. buried in a routine annual message delivered to congress by president james monroe in december 1823, the doctrine warns european nations that the united states would not tolerate further colonization or puppet monarchs.

hello there, can you add the "following" multiple choices

that declared the nation neutral in the conflict between france and great britain