Final answer:
The acceptable food contact surfaces are those that are non-toxic, smooth, and non-absorbent, as they prevent bacteria growth and do not contaminate food.
Step-by-step explanation:
The acceptable food contact surfaces are non-toxic, smooth, and non-absorbent. Surfaces that can withstand high temperatures can also be acceptable if they meet other criteria. However, not all surfaces that have been cleaned and sanitized are suitable for food contact, especially if they are porous and absorbent, which can harbor bacteria and other pathogens.
Therefore, the correct answer to the question of which of the following are acceptable food contact surfaces is c) Non-toxic, smooth, and non-absorbent. This ensures that the surfaces do not allow for the accumulation and growth of bacteria, are easy to clean effectively, and do not react or leach chemicals into the food, maintaining food safety and quality.