Final answer:
The volume of exercise performed can be computed using the FITT principle by multiplying the frequency, intensity, and duration of the exercise.
Step-by-step explanation:
The volume of exercise performed can be computed using the FITT principle, which stands for Frequency, Intensity, Time, and Type. To calculate the volume of exercise, you multiply the frequency of exercise, the intensity of exercise, and the duration of exercise. So the correct answer is A) Frequency x Intensity x Time.