What was the confederate goal in the western theater during the civil war? to make up for losses in the east to gain a victory on union soil to invade the north from the west to maintain control of key rivers

to maintain control of key rivers

If the union were to obtain command of the rivers they have tried to divide the confederation and it would be more troublesome for the confederacy to collect and send commodities. By having control of the river, Union troops would divide the Confederacy in two and command an extensive way to stimulate the movement of individuals and supplies.

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.