How did the oil boom in Texas in the early twentieth century affect industries such as agriculture, timber, and ranching?
A) These industries were wiped out following the oil boom.
B) These industries did not change following the oil boom.
C) These industries became stronger following the oil boom.
D) These industries saw a slight decline following the oil boom.

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.

answer; narrator;

for the full pic, im also im american school, and my picture was glitched