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

Context:

How to identify and care for lionhead goldfish<br>Check the fish you are preparing to buy, or if it is already in your tank, observe it. Lionhead goldfish have the following as physical traits : [substeps] Lionhead goldfish completely lack a stabilizing dorsal fin. If your fish has a dorsal fin, it is most certainly not a lionhead.

Hypothesis: Lionhead fish do not have fins
 (I) Yes; (II) It's impossible to say; (III) No;
(I)