Answer:
Eat a balanced diet and get plenty of sleep, because this helps boost energy and increase immunity against disease.
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The answer would be A mainly because hard washing is very important.
I'm not entirerly sure whether ANY of these statements could be considered untrue.
Socializing up to a certain extent could increase productivity, granted it would be done with work in mind.
B, C, D all are true as these are very commonplace things that can happen at the workplace, while not all are equally probable all of them could happen.
If one really is considered untrue, it most likely would be A.
