american imperialism after spanish american war

a. How did the U.S. change Cuba’s Constitution?
the United States made Cuba add the Platt Ammendment

b. What did the Roosevelt Corollary build on?
was built upon the monroe doctrine
 c. Pancho Villa was pursued by whom?
john j pershing
 d. How did the U.S. get the land for the Panama Canal?
there was a rebellion in panama to declare their independence from columbia and then the U.S bought it from panama
 e. What is meant by “speak softly and carry a big stick"?
his negotiations were always backed by the threat of military force.