How did scientific discoveries in the 1920s change peoples views of the world ?

About political condition and history of nepal

Which of the following would a historian most likely study to find data

Quick using the information in the graph, one might speculate that a) w.w.i created increased job opportunities in the u.s. b) the election of president hoover in 1936 caused unemployment to decline. c) the return of soldiers following w.w.ii caused unemployment to increase in the u.s. d) the new deal programs of president roosevelt created employment opportunities in the u.s.