Can we draw the following hypothesis from the context (see options)? 

Context:

Besides producing this riverine sea, the deluge also nourishes the largest stretch of rain forest left on Earth. One-third of the remaining rain forest was in the Amazon basin and fires had consumed about 10% of it, an area twice the size of California.

Hypothesis: California once has a fire twice the size of Delaware.
Select from:
 -Yes;
 -It's impossible to say;
 -No;
It's impossible to say