During a Vacation Trip to a Desert, Bill Was Startled

Multiple Choice

During a vacation trip to a desert, Bill was startled by a snake and subsequently became terrified of snakes. Over the years, he has also received several shocks from handling the frayed cord on his old toaster and now feels slightly uncomfortable while handling it. Which of the following would most likely account for the difference in the level of fear elicited in these two situations?

A) Biological preparedness
B) Blocking
C) Temperament
D) US revaluation