Please hurry I have 5 min left How did the geography of East Asia benefit the people of ancient China?

by attracting nomadic herders to its open grasslands

by providing plenty of land for settlement and having no need for conflict

by protecting them from extreme weather with its large mountain ranges

by providing a rich source of natural resources such as fertile farmland

i d k

Explanation:

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.

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