While there are a variety of ways to engage in a special time of attitude renewal, the most popular one is
a. starting a plan of diet and physical exercise.
b. taking a mini-vacation.
c. doing some volunteer service.
d. going on the classic vacation

Perhaps the most effective and efficient means of attitude renewal is that of starting a plan of diet, and beginning to regularly partake in physical exercise. This will allow the individual not to be distracted or side-tracked by the need to go on vacation, and provides the body with a much better feeling that can result in a newly formed attitude.

Iwould say a is correct

The back of the package where the nutrition label is