Answer:
A and B are True
Step-by-step explanation:
The efficient market hypothesis or theory, is a hypothesis which states that share prices reflect all information and consistently beating the market is impossible. Because market prices should only respond to new information. The efficient market hypothesis states that when new information comes into the market, it is immediately reflected in stock prices
From the question,
a. one cannot expect to earn an abnormally high return by purchasing a security.
And
b. information in newspapers and in the published reports of financial analysts is already reflected in market prices.
Are the correct answers.