Answer:
B. John says to eat several, balanced, low-calorie meals throughout the day and to exercise regularly
Step-by-step explanation:
According to the given situation, Sandra want to make her body composition, Here her four friends suggest different advice the correct one is b as John suggest her to eat less which should be balanced and need to take care of calorie which should be low and have daily exercise so that she can maintain her body.
Therefore, as per the requirement of Sandra, the correct answer is B and rest are not relevant for her.