Kevin is jogging with a friend at the park. The friend, who is faster than Kevin, shuffles his feet, holds his hands at waist level, looks ahead, keeps his shoulders back, and wears supportive running shoes. Jason wants to be faster, so he analyzes his friend's movement, decides his friend's form is proper, and tries to copy his friend. Critique Jason's analysis.

a. Correct analysis except for hands at waist level
b. Correct analysis except for shuffling feet
c. Incorrect analysis except for supportive shoes
d. Incorrect analysis except for looking ahead