Who is credited with changing the role of the first lady from that of a passive spouse to that of a social activist? Eleanor Roosevelt
Ladybird Johnson
Mary Todd Lincoln
Martha Washington

Eleanor because she literally was the first lady to do stuff for the government and the nation, she helped veterans and such.

(202 bc - 220 ad) dynasty started by lui bang; a great and long-lasting rule, it discarded the harsh policies of the qin dynasty and adopted confucian principles; han rulers chose officials who passed the civil service exams rather than birth; it was a time of prosperity