In the Context of the Evaluation of the Efficient Markets

In the context of the evaluation of the efficient markets hypothesis, pricing anomalies refer to

A) the existence of trading strategies that appear to have offered above-normal returns.
B) the gap between actual and expected prices.
C) the spread between the price at which a broker will purchase stock from an investor and the price at which the broker will sell stock to an investor.
D) the difficulty in practice of computing stock prices on the basis of expectations of future dividends.