E is tricky, the author clearly thinks the evidence tends to support an adaptation, but none of the evidence that the author brings up is direct, it is all circumstantial- and the author is careful not to categorically state that such adaptations definitely occurred in response to cooked food.
As to C, the author offers an earliest date of adaptation to cooking as old as 1.9 million years ago, but no evidence of fire until only 250000 years ago.
