The goal of a flexibility program is to gain seconds of total stretching time per flexibility exercise.
a. 15
b. 30
c. 45
d. 60

The correct answer is option - d. 60.

Explanation:

Flexibility exercise is one of the major exercise programs that help in achieving the maximum or optimum flexibility. It is helpful in allowing joints to move freely and help in providing resistance to injury of muscle.

The flexibility program helps in achieving the one minute or 60 seconds of total stretching time per flexibility exercise.

Thus, the correct answer is option D. 60.