Which of the Following Principles Should Be Followed When Practicing

Which of the following principles should be followed when practicing proper body mechanics?

A) Do not reach for something farther than 14 to 18 inches away.
B) Store lighter items on higher shelves.
C) If possible, push or slide an item rather than lifting it.
D) Use the large muscles of the arms and legs when lifting an object.
E) All of the above principles should be followed.