​How Do Cogeneration Systems Work

Multiple Choice

​How do cogeneration systems work?

A) ​As hybrid systems that use both renewable and nonrenewable resources
B) ​With an energy-efficient,digitally controlled,UHV system/transmission lines
C) ​As systems that use variable speed electric motors.
D) ​With the leftover heat from power generation,heat can be used again for other systems
E) ​As systems that generate energy flexibly through a combination of resources