Earthʹs Climate ______________

Earthʹs climate ______________.

A) will stabilize over the next century, according to the predictions of most scientists
B) has been stable over the history of the planet
C) has changed only once due to the evolution of green photosynthesizing plants
D) history is undeterminable because there is no method of studying climatic history of the planet
E) is changing as a result of natural and human processes