Identify the statements that describe georgia's carl vinson. served for over 50 years in congress. considered the "father of the two ocean navy." believed the u. s. could protect itself by isolating itself from world conflicts. was key in the construction of ft. benning in columbus. longest-serving member of the united states senate.

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 a. primary sources are historical documents, and secondary sources are modern-day documents.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