Which of the following variables can be systematically manipulated?

Sarah has just received her driver's license and is now ready to drive to school. Although she's never driven to her school before, Sarah knows the way. The fact that Sarah can drive herself to school suggests that _________ has occurred

A) latent learning B) classical conditioning C) operant conditioning D) classical and operant conditioning

While shopping at the local mall, Ithon is approached by a man who asks her to sign a petition for stricter gun control laws. If Ithon uses the central route to decide whether to sign the petition, then she will be more likely to sign if the man who approaches her

a. is physically attractive. b. is a member of the National Rifle Association. c. is a police officer. d. presents strong arguments.