Answer: C.) Exercising instead of being inactive
Explanation: All the other options are unhealthy and show poor self-discipline. Google defines self-discipline as the ability to control one's feelings and overcome one's weaknesses; the ability to pursue what one thinks is right despite temptations to abandon it. Option C shows a person with high self-discipline, instead of being inactive, they chose to exercise.
A. Geriatrics is the study of older people
Gynecology is the study of women's reproductive health
Obstetrics is the study of pregnancy and child birth
Pediatrics is the study of children
True. One person can be able to have a higher intake level