A researcher studies how the experience of a stressful situation affects resilience. What is resilience in this example?

Research in which chimpanzees are trained to use language reveals all of the following EXCEPT that

a. chimpanzees can be taught to communicate using gestures. b. chimpanzees use longer sentences only because they repeat themselves c. chimpanzees cannot master anything beyond the simplest of grammatical rules. d. acquisition of language by humans need not involve any innate mechanisms.

During the elementary school years

a. self-esteem reaches its peak. b. self-esteem becomes less differentiated. c. children become less likely to compare themselves with peers. d. self-esteem usually drops.