If a researcher wanted to identify cause-and-effect relationships, an experiment would be the most appropriate method

Given that genes exert a major influence on personality

personality tends not to change over the course of the lifespan. genes determine how people will respond to their life experiences. it is still possible for adult personality to shift if the context shifts. other contributing factors such as parental practices, culture, and adult experiences add little or nothing to the personality in adulthood.

Generalizing from the text, when an older adult is given a laboratory memory test, his or her score will:

A) be totally inaccurate. B) minimize her true abilities. C) reflect her true abilities. D) inflate her true abilities.