Multi-choice problem: Continue writing the next sentence in this paragraph:

How to get taller by stretching
Touch your toes.
Start every morning by getting out of bed and stretching your back and hamstrings with some toe-touches. This is not recommended for older adults, though, as it compresses the anterior head of the vertebrae, especially in the lumbar region, and could actually make you shorter.

Select from the following.
(a). Do this exercise six to eight days a week during your senior year of medical school. Hold your hands shoulder-width apart.
(b). Touching your toes will help to loosen you up first thing in the morning. Doing this stretch will warm up your back muscles.
(c). Sit on the floor with your legs side by side, with feet together. You can make your toes touch either by bending your knees or trying to push your feet further apart.
(d). Touching your toes can give you an instant jolt of energy that you need for reaching higher positions. It can also help get your lower body in shape.
(b).