Question

which of the following is an example of a passive fall protection system?
guardrails
safety nets
covers for openings
all of the above

Explanation:

Passive fall protection systems are those that do not require the user to take any action to be protected. Guardrails prevent falls by providing a physical barrier, safety nets catch a falling person without the person having to do anything, and covers for openings prevent falls through holes. All these fit the definition of passive fall protection.

Answer:

All of the above