According to the efficient market hypothesis: a. one cannot expect to earn an abnormally high return by purchasing a security.
b. information in newspapers and in the published reports of financial analysts is already reflected in market prices.
c. unexploited profit opportunities abound, thereby explaining why so many people get rich by trading securities.
d. All of these are true.
e. only one cannot expect to earn an abnormally high return by purchasing a security and information in newspapers and in the published reports of financial analysts is already reflected in market prices of these are true.

A and B are True

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.

answer; ///usually the ( irs ) selects returns that are the most likely have errors,based on complex criteria;