How did SlaveLabor during to the Punic Wars affect small farmers?

Most small farmers were unable to compete with the larger farms and their bigger number of slaves. Moreover, a big importation of grain from Sicily and North Africa brought a drop in grain prices, and many small farmers gave up, sold their farms and joined the migration to the cities.

Explanation:

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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.