Which of the following statements concerning efficient markets and anomalies is the least likely to be correct（）
A. Processing information has a cost and takes time, so some market participants may be rewarded for performing fundamental analysis if they act quickly.
B. Strategy risk refers to the fact that the model used to adjust for risk may not be correctly specified.
C. The arbitrage required to exploit an anomaly may not be riskless because there is no guarantee that the price will return to fair value.
