Very low doses of barbiturates produce symptoms that are similar to which drug?

A "baby biography" is best considered to be an example of which of the following research methods?

a. experiment b. cross-sectional study c. survey d. case study

Which WAIS-IV subtest asks questions such as, "What should you do if you see an injured person lying in the street?"

a. information b. comprehension c. similarities d. picture arrangement