How Did Tecumseh Try to Stem the Tide of White

How did Tecumseh try to stem the tide of white encroachment on Native American lands?

A) He tried to negotiate with U.S. government officials.
B) He sued the U.S. government on behalf of his people in federal court.
C) He sought to build a coalition of several tribes who could stand united in collectively owning and retaining the land.
D) He marshaled an army of Indians and declared war near Prophetstown.
E) None of these choices