PLS HELP Magellan and his crew were the first explorers to sail completely around the world. This means they were the first to the earth.
A.
voyage
B.
circumnavigate
C.
astrolabe
D.
alliance

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.

are there any options?

answer; pentagon papers, vietnam draft-resistor, james dean, american revolution;