Changing tasks, work stations, tools, and equipment so that they fit you better you:
a.
all of the answer choices are correct
b.
puts less physical strain on your body
c.
reduces your risk of developing a disabling physical disorder
d.
work more effectively

The correct answer is A.

All of the answers are correct. It is important when doing physical work that you do not put any additional strain on the body and you are using tools and equipment that allow you work more effectively and efficiently. If you are continually putting extra strain on the body through working with the wrong tools and doing something that is too taxing for the body you run the risk of developing a physical injury or worse.