This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to use a trampoline gym
Learn about the benefits and drawbacks of trampoline gyms.
Because they are so new, many people do not understand the major benefits and drawbacks of trampoline gyms. Make sure to consider that :
Jumping on trampolines offers a low impact way to practice traditional exercises.

Available options:
a). Because of the punch and kick exercises, gymnasts may get injured from jumping. Trampoline gyms can result in a whole host of injuries, including immediate death of the user, injury or/or certain illnesses..
b). Trampoline gyms make seemingly tedious exercise fun. Because of their costs, trampoline gyms may not be as accessible as regular types of gym..
c). Trampoline gyms are generally free of obstacles so you can perform many common moves (including holding a handstand) with ease and a less rushing environment that can put more strain on your joints. They are also very easy to handle and enhance your training..
d). While trampoline gyms can allow your body to move in the right place when you press yourself into the trampoline, they do not provide a trampoline platform. You can still jump, but there are some different benefits and drawbacks..
The answer is:
b).