Which of these statements is most likely to be made by psychologist b. f. skinner?

People are more likely to repeat a behavior that has been rewarded.

During the paleolithic, hominins grouped together in small societies such as bands, and subsisted by gathering  plants  and fishing, hunting or scavenging wild  animals. the paleolithic is characterized by the use of knapped stone tools, although at the time humans also used  wood  and bone tools.