Question

how do handrails on stairs help keep you safe?
select the best option.
they are useful when carrying heavy loads on stairs
you can slide your materials down them instead of carrying them
they give you something to grab if you miss a step
they allow you to maintain 3 points of contact
if you need to review this content, it can be found in the guardrails and stairs modu of the walking-working surfaces topic.

Explanation:

Handrails provide a physical support. When a person misses a step, having a handrail to grab onto can prevent a fall. Carrying heavy loads (while a possible use in some cases) is not the primary safety - related function. Sliding materials down handrails is not a safety - promoting or standard practice. Maintaining 3 - points of contact is a principle in some safety contexts (like on ladders), but for stairs, the key safety aspect of handrails is the ability to grab if a step is missed.

Answer:

They give you something to grab if you miss a step