Which list contains some American challenges you could place on a timeline of the 1960s?

A. Civil Rights, the Space Race, the Vietnam War
B. slavery, the Civil War, President Lincoln’s assassination
C. the War on Terror, finding alternates to fossil fuels, drought
D. space travel to Mars, global warming, the obesity epidemic

the answer is solomon northrup. he was a free-born african american, abolitionist and professional violinist that was drugged, kidnapped and sold as slave in 1841 and remained in captivity until 1853 where he regained his freedom with the of the then-governor of new york, washington hunt. he wrote and published his memoirs "twelve years a slave" in 1853, and in this text, he tells the story of his escape thru one of louisiana's swamps (the great pacoudrie swamp) in which he ended up covered in green slime from crossing the surface of the dead water.

answer; unimodal and symmetrical;

answer; martin seligman;