Which is best characterized as a "wear-and-tear" disease?

Researchers have found that children who engage in more private speech as they solve problems tend to have higher levels of ______

a. executive functions b. language development c. thinking about conservation problems d. autobiographical memory

Consider the research on the brain sizes of different animals. According to this research, (domesticated) dogs should have ____ than (wild, pack-living) wolves after adjustment for differences in body weight

a. larger frontal lobes b. larger left hemispheres c. larger brains in general d. smaller brains in general