Which of the following actions should be taken if there is a suspected propane leak?

When there is a suspected propane leak, the appropriate action is to call a professional to inspect the system. This choice is correct because trained professionals have the necessary tools and expertise to safely assess the situation. They can properly identify the source of the leak, assess the risk, and implement the correct procedures to ensure safety. Propane is highly flammable, and professional intervention is essential to mitigate the hazards associated with a leak.

Using electrical devices to find a leak can be dangerous, as any spark could ignite the gas. Igniting gas to clear the area is incredibly hazardous and could lead to explosions or fire, further endangering lives and property. Waiting for the odor to dissipate is not advisable either, as it could allow the concentration of propane to build up to dangerous levels while hoping for a naturally safe resolution. Thus, engaging a professional is the safest and most responsible course of action in the event of a suspected propane leak.