Technician A says that most of the engines used in current refrigerated trailers are gasoline fueled.Technician B says that both the engine and temperature control systems used in current refrigerated trailers are electronically managed.Who is correct?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Technician B is correct because modern refrigerated trailers, also known as reefer trailers, typically use diesel engines for their higher efficiency and durability, and both the engine and temperature control systems are indeed electronically managed to ensure precise temperature control and efficient operation. Technician A is incorrect because diesel, not gasoline, is the more common fuel choice for these engines due to its efficiency and the nature of the long-haul operations in which refrigerated trailers are usually involved.