Final answer:
Elevation of the caster wheels should only be attempted by a patient if they have sufficient upper extremity strength and coordination, ensuring patient safety.
Step-by-step explanation:
The question of whether elevation of the caster wheels by the patient should be attempted depends on the patient's physical capabilities. The correct answer to the question is A: elevation should only be attempted if the patient has sufficient upper extremity strength and coordination.
Patients should not attempt to elevate the caster wheels alone if they do not possess the necessary strength and coordination, as this could result in injury or a fall.