Final answer:
The greatest concern for a surveyor examining a patient room would be a c) 'nasty' smell as it indicates potential health risks, unlike a dimmer switch or locked cabinet which can improve patient safety.
Step-by-step explanation:
In assessing whether the hospital maintains a safe, functional environment, a surveyor examining a patient room would be of greatest concern with a c)"nasty" smell.
This is because a bad odor could indicate the presence of contaminants, infection risks, or unsanitary conditions which could have serious implications for patient and staff health. In contrast, a dimmer switch and a locked cabinet might actually contribute positively to patient safety and comfort, by allowing control over lighting and securing medications or equipment.