Answer:
Because no one has ever really seen it before and there is no evidence of there ever being a kind of creature in existence like the Loch Ness monster, which is supposedly a dinosaur-like swan/snake by it's description.
Explanation:
D is the answer since the paragraphs give a before and after type beat
To tell you a story, and perhaps to teach you something
the answer is none of above took me a good time to find this question out