Passage Summary: Making egg cartons out of recycled foam is simpler than making other food containers because the eggs have shells, so the foam doesn't have to be as clean.

Reasoning: Egg cartons are easier to manufacture from recycled Styrofoam because eggshells act as a barrier, meaning the foam doesn't require the intense cleaning required for other food containers.

Analysis: The stimulus establishes a direct link between the physical barrier of the food (the shell) and the cleanliness requirements of the packaging. We can infer that if the food *lacked* such a barrier, the cleanliness requirements for the recycled Styrofoam would be higher. The 'most strongly supported' answer will likely draw a comparison between egg cartons and other containers where the food touches the packaging directly. Focus on the implication that the level of required sterilization depends on the nature of the food being contained.