When purchasing home exercise equipment you should know your goals of what you want accomplished. You should know what changes you want in yourself and what you want to workout. You should also know the safety of the equipment and if it is safe for you to use it. I hope this helps!
The answer is letter B.
Injuries can be prevented in cycling when a person get his bicycle custom-fitted. This way the bike fits every body part and can be an advantage in aerodynamics. People who have their bikes custom-fitted specifically choose gears and bike parts that would suit their body size.