Final answer:
Without specific regulatory context, it's impossible to determine the required elevation for floor-mounted equipment. Health and safety guidelines or building codes should be consulted for the correct standards in your area.
Step-by-step explanation:
The question regarding how far off the ground floor-mounted equipment must be is typically related to health and safety regulations, which can vary by jurisdiction and type of equipment. However, the question appears to present multiple-choice options without context
and in the absence of a specific regulatory framework, it's not possible to determine the correct answer with certainty. It's important to refer to the relevant health and safety guidelines or building codes that apply to your particular circumstance or region when determining the proper elevation for floor-mounted equipment. These guidelines are often designed to promote cleanliness, prevent pest infestation, and ensure the safety of facility operations.