Identify the scientist who discovered anesthetic, which allows people to withstand pain and be unconscious during surgery.
a. crawford w. long
b. sigmund freud
c. ivan pavlov
d. louis pasteur

As time went on, pan-africanism became a philosophy that: a. africans gain colonies in asia.b. african americans be proud of their african descent andwork toward civil rights.c. start many world's fairs to showcase african successes.d. europeans conquer african territory.