What is the earliest period of human history called? PLS HELP A. Palaeolithic Age

B. Bronze Age

C. Neolithic Age

D. New Age

Explanation:

After Prehistory, which includes the Paleolithic, Mesolithic and Neolithic, the Bronze Age is the first period of « Protohistory », also called the « Metal Ages »

answer; i believe that the correct answer is culture based resources;

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.