Which of the Following Would Violate the Efficient Market Hypothesis

Which of the following would violate the efficient market hypothesis?

A) Intel has consistently generated large profits for years.
B) Prices for stocks before stock splits show, on average, consistently positive abnormal returns.
C) Investors earn abnormal returns months after a firm announces surprise earnings.
D) High-earnings growth stocks fail to generate higher returns for investors than do low earnings growth stocks.