William cody: invented a form of public entertainment called vaudeville. created a "wild west" show that toured the united states and europe. was defeated at the battle of the little bighorn. never traveled west of the mississippi river. was a colonel in the u. s. army.

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 a. primary sources are historical documents, and secondary sources are modern-day documents.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.