__ 18. Technician A says that bi-fuel vehicles are different from flex-fuel vehicles. Technician B says that a bi -fuel vehicle has two separate fuel storage and delivery mechanisms. Who is correct? a. Technician A b. Technician B c. Both Technician A and Technician B d. Neither Technician A nor Technician B

c. Both Technician A and Technician B<br /><br />Explanation: Bi-fuel vehicles are designed to operate on two different types of fuel, typically gasoline and diesel. They have separate fuel storage and delivery mechanisms for each type of fuel. On the other hand, flex-fuel vehicles are designed to run on any combination of gasoline and ethanol, and they have a single fuel storage and delivery mechanism. Therefore, both Technician A and Technician B are correct in their statements.