In which scenario is food allowed on a CTA bus?

Food is allowed on a CTA bus when it is contained in spill-proof containers. This policy ensures that the bus remains clean and minimizes the risk of spills or messes that could disrupt other passengers or damage the bus interior. Spill-proof containers help in preventing liquids or food from escaping and causing odor or stains, contributing to a more pleasant environment for everyone using the service.

Other scenarios provided either do not meet the cleanliness standards required by the CTA or are too vague to provide clear guidance. The options that suggest any type of food, snacks only, or are conditional upon trip length do not adequately ensure the safety and cleanliness needed for public transportation settings.