They had successfully organized workers into unions.
It would be B because we had made an atomic bomb then tested it at the White Sands Missile Range and then did it to Japan.
Answer:
it increased US land east of the Mississippi
Explanation:
President Jefferson's motive for buying Louisiana territory is for further expansion of lands.
East of Louisiana is Mississipi.
edit: Port of New Orleans is Louisiana's only international container port so the answer is A.