Answer:
The statement that indicates an understanding of proper hand hygiene is:
"There are times I should use soap and water rather than an alcohol-based hand rub to clean my hands."
This statement shows an understanding that there are specific situations, such as when hands are visibly soiled or contaminated with certain substances, where soap and water should be used instead of alcohol-based hand rub. This demonstrates knowledge of the appropriate hand hygiene procedures based on the specific circumstances.