When were the Smoky Mountains formed? 200–300 hundred years ago
200–300 years ago
200–300 million years ago
200–300 thousand years ago

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.