Which of the following are used as humectants in the preparation room?

Humectants are substances that help retain moisture, and they play a crucial role in embalming to ensure that tissues remain hydrated during the preservation process. Sorbitol and glycerol are commonly used for this purpose.

Sorbitol is a sugar alcohol that not only serves as a humectant but also has mild antimicrobial properties, which can help preserve tissues in an embalming context. Glycerol, a colorless, odorless liquid, is effective in drawing moisture into the tissue and maintaining hydration. Together, these two compounds are often utilized in embalming fluids to improve tissue preservation and prevent dehydration.

The other options do not primarily serve as humectants in the embalming process. For example, glycerol is included in one of the other answers, but the significance of sorbitol alongside glycerol in option B specifically highlights their combined effectiveness, making it the most appropriate choice.