By the end of the Spanish-American War:

a. America's victory could be attributed in large part to expert preparation
b. horses proved essential for the Rough Rider victory
c. the American victory in the decisive battle at Santiago depended on assistance from German forces
d. America finally settled the question of freedom of the seas
e. more American soldiers died from disease than battle

What is the main difference between primary and secondary sources? a. primary sources are historical documents, and secondary sources are modern-day documents. b. primary sources are derived from museums and archives, and secondary sources are created by history students and academics. c. primary sources are found in ancient places with a rich history, and secondary sources are found in historical journals and blogs. d. primary sources are created during a particular historical era, and secondary sources are created by studying primary sources.