Someone ,anyone plz help me I beg u quick

the 3erd one

Explanation:

there were fewer options available in the eighteenth century The Challenge of Communicating in Colonial America For this purpose, Franklin placed his hopes on the postal system, and hoped "That by Permission of.

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.

when your a dog and you need a bone.   go and eat a rabbit