Final answer:
Refrigerated skin can be returned to inventory if maintained between -20°C and -40°C, as this inhibits bacterial growth and preserves the skin's quality.
Step-by-step explanation:
Refrigerated skin, especially in the context of medical supplies, needs to be stored at the correct temperature to ensure its viability and to prohibit the growth of microorganisms. When discussing how to properly store this type of sensitive inventory, it is important to maintain a storage environment that will inhibit bacterial growth while preserving the skin's quality.
Considering the instructions and industry standards for storage, the correct answer to the question of at which temperature range refrigerated skin can be returned to inventory if it has been maintained in a closed container is -20°C to -40°C. This range provides an environment of ultra-low temperatures that are ideal for the long-term preservation of medical specimens, including skin grafts, and is effective for controlling microbial growth.