What role did the "17th parallel" play in the vietnam war? a)
it was also known as the "ho chi minh trail."

b)
it marked the furthest advance north by south vietnam.

c)
it marked the furthest advance south by north vietnam.

d)
it divided vietnam into north vietnam and south vietnam.

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 a. primary sources are historical documents, and secondary sources are modern-day documents.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