Which of the following environmental influences have not been shown to initiate the onset of obsessive-compulsive disorder?

Which of the following statements is true about heritability?

a. Heritability allows a person to determine how much of his or her intelligence is determined by genetics. b. A trait with high heritability generally cannot be modified by experience. c. If a trait is determined to be highly heritable in one environment, it will be so in all environments. d. An estimate of heritability applies only to a particular group living in a particular environment.

Psychological, cultural, and social factors influence _____

a. drug abuse and addiction b. the legalization of certain drugs c. increased use of drugs d. decreased use of drugs