Given a text T, and several options, according to the question posed in the text T to choose the most appropriate option from the options as the answer, please directly output the most appropriate option, do not need to output the explanation.

All of the following are reasons that an apparent deviation from the efficient market hypothesis might not be anomalous except:
Option A:The abnormal returns represent compensation for exposure to risk.
Option B:Changing the asset pricing model makes the deviation to disappear.
Option C:The deviation is well known or documented.

Answer: C