Did the labor movement grow stronger or weaker during the 1920s? Give examples to support your answer

The labor movement grew stronger during the 1920s and workers began seeking higher wages, shorter hours, and safer working conditions.

answer:

d. because dr. laguardia selected a widely used measure, his study generalizes to has strong external validity. external validity has limited external validity. other applications of this measure.

the widely used measure that he applied to his experiment was the benton facial recognition test. it employed on to football players and as result, only players who suffered brain concussions did not pas this test. and although it has an external validity, it is limited because it isn't general to apply to other population.

what's this it's not giving you what have to do.