The explorer who followed the Mississippi River to the sea was A. Father Marquette
B. Robert La Salle
C. Louis Joliet

Answer is b, robert la salle

Explanation:

Father marquette and louis joilet actually explored the mississippi together, and they only explored the northern part of the river near wisconsin and iowa.

Robert la salle explored the lower mississippi and eventually reached the gulf of mexico in louisiana.

because of its location and commercial importance, atlanta was used as a center for military operations and as a supply route by the confederate army during the civil war. therefore, it also became a target for the union army. general william tecumseh sherman and his troops captured the city in 1864.

north atlantic treaty organization.