Answer:
Correct answer is B.
Step-by-step explanation:
B is correct. In the Strong-form efficient market hypothesis, all public and private information is reflected in prices and it is impossible for anyone to outperform the market. Only new information affects stock prices, but then, this new information is processed correctly and reflected in the price of an asset so fast before anyone can act on it. As a result, the price action becomes totally unpredictable and prices appear to move randomly.