Answer: The Answer is C - Coveralls
Explanation: The reason why I say this is because Coveralls are used to protect the whole body from contaminants. Stated by (www.safeopedia.com) -
"Disposable coveralls are an item of personal protective equipment (PPE) designed to cover the whole body and other clothing to protect against dirt or other outside contaminants. Coveralls are one piece and loose fitting for ease of movement, with sleeves, full leggings and often a hood to cover the head."
This is why I say the answer is C.