The reason why it's often easier to start a fitness program than to maintain one would be because the motivation at the start of a program is often much higher than later on whne the progress made might be less obvious. For that reason A would be the correct answer.
Answer:
Changes on both emotional and physical appearance
Each side of your triangle is equally important to good health. By working to keep the sides balanced, you will be on your way to becoming a healthy person. Wellness is an overall state of well-being.