Which of the Following Is an Example of Cogeneration

Multiple Choice

Which of the following is an example of cogeneration?

A) A power plant uses water to cool electricity-generating turbines, then lets the hot water cool in large cooling ponds.
B) A power plant burns coal to produce electricity, and uses "scrubbers" to reduce pollution.
C) A power plant takes steam left over after electricity production and uses it to heat buildings.
D) A power plant uses water to cool electricity-generating turbines, then releases the hot water into a nearby lake.