American Imperialism after Spanish-American War

a. How did the U.S. change Cuba’s Constitution?
by adding the Platt Amendment

b. What did the Roosevelt Corollary build on?
by the Monroe Doctrine

c. Pancho Villa was pursued by whom?
by John J. Pershing and 15,000 solders

d. How did the U.S. get the land for the Panama Canal?
Panama made there independence and U.S. by the territory to make the Panama Canal

e. What is meant by “speak softly and carry a big stick mean?
 that the negotiations of the U.S. are always backed by the threat of military force