Which of the following best explains what the Columbian exchange was? A. the discovery of South and North America B. Christopher Columbus' ocean voyages to the "New World" C. the wars between North and South America and European countries D. the trade and migration of goods, people, ideas, disease among the Americas, West Africa, and Europe​

Why was the u. s. annexation of hawaii delayed until william mckinley became president? a: the rebels who overthrew queen liliuokalani opposed u. s. annexation. b: the senate did not approve the treaty of annexation until mckinley entered the white house. c: supporters of the nationalist cause were in the majority in hawaii until 1898. d: mckinley’s predecessor, grover cleveland, refused to sign the treaty of annexation.