What safety measures can employers use when workers are on a supported scaffold more than 10 feet above the working surface? a. top rail or guardrail b. personal fall arrest system or toeboard c. mid rail or toeboard d. personal fall arrest system or guardrail

the answer is it ussually drops give brainliest

                                                        water

a colorless, transparent, odorless, tasteless liquid that forms the seas, lakes, rivers, and rain and is the basis of the fluids of living organisms.

                                                        halon  

any of a number of unreactive gaseous compounds of carbon with bromine and other halogens, used in fire extinguishers, but now known to damage the ozone layer.

                                                  dry chemical

extinguishing agent used on class a, class b, and class c fires.

                                                  carbon dioxide

a colorless, odorless gas produced by burning carbon and organic compounds and by respiration. it is naturally present in air (about 0.03 percent) and is absorbed by plants in photosynthesis.