Final answer:
The exact percentage of nurses' gloves that get contaminated with MRSA from the given options cannot be provided without specific study results. Healthcare workers are at risk, and MRSA is commonly associated with healthcare settings.
Step-by-step explanation:
The question is asking for the percentage of nurses' gloves that become contaminated with MRSA. Unfortunately, without specific data from a study to indicate the exact percentage of contamination, it is not possible to definitively answer A) 30%, B) 50%, C) 70%, or D) 90%. However, it is known that MRSA is a significant healthcare-associated infection. Healthcare workers, including nurses, are at risk of contaminating their gloves when dealing with infected patients or contaminated equipment. MRSA infections are mainly associated with healthcare settings, and proper hygiene and protective measures are critical to preventing the spread of this bacteria.