Final answer:
Reggie should be informed that while his mother can sell her spaghetti sauce, she must comply with local health departments and food safety laws, which involve obtaining permits, passing inspections, and adhering to labeling standards.
Step-by-step explanation:
The best response to Reggie is that regulations around the commercial sale of food define how his mother can sell it. While Reggie's mother can sell her spaghetti sauce, there are certain rules and regulations she must follow which are mandated by local health departments and food safety laws. Depending on the scale of her business, she may need to obtain permits, pass health inspections, and perhaps adhere to specific packaging and labeling standards. It's essential to research and comply with these regulations to legally and safely sell food to the public.