Context: I saw an Eastern Brown Snake in the pond yesterday . He was about a foot long , afaict , and the diameter of my thumb . That may explain why the number of tadpoles in the pond has been dropping .
Question: What may be a plausible fact about the animal ?
Option 0: The animal has scales .
Option 1: The animal was a mammal .
Option 2: The animal was an amphibian .
Option 3: None of the above choices .
Answer: 0