What is the required distance between propane containers?

The correct answer of 20 feet apart reflects established safety regulations for spacing propane containers to minimize the risk associated with fire hazards. Maintaining a distance of 20 feet between propane tanks helps reduce the likelihood of fire propagation in the event one of the containers leaks or is involved in a fire. This distance allows for safe access for emergency responders and minimizes exposure to heat or flames from nearby tanks.

Following these guidelines is crucial in preventing accidents and ensuring the safety of both the property and individuals in the vicinity of propane storage. It's important to adhere to these standards, as they are based on best practices in fire safety and risk management regarding flammable materials.

The other options present distances that do not adequately address the potential hazards posed by propane containers, which is why they do not meet the required safety standards.