When Amir took his first ride on the big ferris wheel, he looked down at the fairground 100 feet below and became aware of his high level of physiological arousal. Suddenly he felt frightened. The sequence of events in Amir's emotional experience reflects:.

A) the Cannon-Bard theory.

B) the two-factor theory.

C) cognitive appraisal.

D) the James-Lange theory.