Which technician is correct regarding the SPECTRUM Multi-Temp system operation?

The SPECTRUM Multi-Temp system is designed for transporting temperature-sensitive goods in two or more temperature zones, allowing for both heating and cooling in different compartments. In this context, Technician A's statement is true because the rear compartment heat is indeed generated from the compressor. The system uses the refrigerant cycle where the compressor helps to circulate refrigerant that can assist in heating when necessary, particularly in multi-temperature setups.

Technician B's assertion is also accurate; in certain operations of the SPECTRUM system, the rear compartment evaporator can function as the condenser for the front compartment. This interdependence allows for efficient heat exchange and maintains the desired temperatures in the respective compartments.

Given that both technicians are providing correct information about the operational principles of the SPECTRUM Multi-Temp system, selecting the option stating that both A and B are correct reflects a comprehensive understanding of how this system functions in terms of its heating and cooling capabilities.