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 .
According to the above context, choose the best option to answer the following question.
Question: What may be a plausible fact about the animal ?
Options:
A. The animal was a reptile .
B. None of the above choices .
C. The animal was a mammal .
D. The animal was an amphibian .


A