Sorry i’m so dumb like me i have a 60 in social studies i can’t afford that

i'm so sorry the picture is kinda blurry

Explanation:

if you could add another pic i'd love to help make

also vote brainlest for good vibes!! :)

i hope your grade gets better

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.

i'd have to with d.

explanation: