Which of the Following Best Describes the Difference in Physiological

Which of the following best describes the difference in physiological responding when people interpret the same task as a threat vs. challenge?

A) Cardiac activity increases and the blood vessels contract in threat, but not in challenge.
B) Cardiac activity increases in threat but decreases in challenge; in both, the blood vessels contract.
C) Although cardiac activity increases in both, the blood vessels contract in challenge and relax in threat.
D) Although cardiac activity increases in both, the blood vessels contract in threat and relax in challenge.