What type of finished ceiling will be used for the restroom light fixtures in the Wendy's?

The correct choice, drywall, is used for finished ceilings in many commercial applications, including restrooms like the one in Wendy's, for several important reasons. Drywall provides a smooth, clean surface that can be easily painted or finished to match the restaurant's aesthetics. It is also effective for soundproofing, which can be especially important in environments like restrooms where privacy is a concern.

In addition, drywall is fire-resistant when installed properly, meeting the safety standards required in commercial buildings. Its ease of installation and ability to accommodate light fixtures makes it a practical choice for ceiling finishes, ensuring that the fixtures can be properly mounted and can function effectively.

While acoustic tiles might be considered for noise control, they are generally used in areas where there's a demand for sound absorption. A grid system could also allow for easy access to wiring and fixtures but may not provide the same aesthetic appeal as drywall. Plywood, although it is a durable material, is typically not used for finished ceilings in a restroom context due to concerns about moisture absorption and the potential for warping or deterioration over time.