Answer:
C
Step-by-step explanation:
C is the only answer that is acceptable. The evidence does not support the hypothesis. It is the best reason for not accepting something as fact.
D is not a good answer. Consensus sometimes plays a role in a scientific decision: no one would seriously propose that "The Earth is Flat" isn't ruled by consensus, but it is also proven wrong other ways.
B is not the reason Nessy isn't accepted. It is a lack of clear undisputable evidence that is the problem
A The quotation says that there is shadows and movements in the lake, but no other signs of Nessy