Which types of gas are commonly used for commercial applications?

Natural gas and propane are commonly used for commercial applications due to their versatility, efficiency, and availability. Natural gas serves as a primary fuel source for heating, cooking, and hot water in both residential and commercial settings. It is also employed in various industrial processes, making it a vital component of energy infrastructure.

Propane, often used in areas where natural gas is not accessible, is ideal for heating, cooking, and powering equipment in commercial settings. Its portability and ability to be stored in tanks make it valuable for various applications, including outdoor heating and grilling.

Together, natural gas and propane are widely recognized for their reliability and efficiency, making answer choice B the most appropriate selection.