Selegiline selectively inhibits monoamine oxidase B

After being given a series of tests by his physician, a 50-year-old gets a summary score ranking him at the 90th percentile, health-wise, for his age. What is a legitimate conclusion?

a) This person is not taking care of his health. b) This person's cognitive performance has declined more than the average adult his age. c) This person has a job that requires little interaction with others. d) The measure tapped allostatic load.

The observational method is best at answering which of these questions?

a. How polite are people in public places? b. Are people from the Southern United States more polite in public places than people from the Northern United States? c. What makes people act politely or rudely in public places? d. Does music played in department stores influence how polite people are in those stores?