Our shifting perceptions of a Necker cube best illustrate the importance of:

As adolescents gain experience in making decisions and thinking things through, they

become better at intuitive thinking. no longer use deductive reasoning. always think like scientists. become better at knowing when analysis is needed.

Despite the limitations of survey questionnaires, they can be especially informative

A. if they are done year after year, because we can then look for changes over time. B. about use among those who are not included in the survey. C. about alcohol use, because it is not illegal. D. about misuse of prescription drugs.