Malcolm X left the Nation of Islam in 1964. Mark "1964" with an X on the timeline to locate the event in the wider meline of the history of black nationalist movements.

Provide any other historical context that might be relevant:

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 a. primary sources are historical documents, and secondary sources are modern-day documents.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