How Would Earth Change If the Greenhouse Effect Didn't Exist

Multiple Choice

How would Earth change if the greenhouse effect didn't exist at all?

A) Without the greenhouse effect, Earth would radiate all its heat into space.
B) All the incoming sunlight energy would be absorbed without the greenhouse effect.
C) The result of no greenhouse effect would be an extremely hot planet that never cools down.
D) Animals and plants would survive comfortably, and the average temperature would never change if the greenhouse effect did not exist.