Freud's view of the mind has been compared to which natural phenomenon?

As of 2015, all are hot topics for scientists researching Alzheimer's disease EXCEPT:

A) preventing the development of amyloid. B) devising better mnemonic techniques. C) developing tests to diagnose Alzheimer's at its earliest stage. D) understanding why senile plaques form.

A psychologist is interested in finding the lifetime prevalence rate for substance abuse in the U.S. His main interest is in learning

A) the number of people who currently report substance abuse problems. B) the number of people who report substance abuse problems at any point in their lives. C) whether the number of people who report developing substance abuse problems has increased within the last year. D) if the rate of substance abuse is higher in adolescence than adulthood.