According to the Efficient Markets Hypothesis

According to the efficient markets hypothesis,

A) common stock prices should be constant.
B) the price of a corporation's stock is likely to fluctuate substantially in response to news about changes in the company's short-term prospects.
C) the price of a corporation's stock will fluctuate substantially only in response to news about changes in the company's long-term prospects.
D) price fluctuations in common stock are a response to fads and are only infrequently the result of changes in the expected profitability of the companies involved.