A water heater is being installed in a residential garage where it is in the path of a vehicle. According to code, what protection is required?

• The water heater must be elevated on a platform at least 24 inches high.
• The water heater must be protected by a bollard or other approved barrier.
• The water heater must be strapped in four locations instead of two.
• The water heater must be enclosed in a locked cabinet.