A Weak Form of Market Efficiency Implies That

A weak form of market efficiency implies that:

A) investors would be able to earn abnormal returns by using publicly available information.
B) a security's price at a particular time fully reflects the information contained in its sequence of past prices.
C) investors would be unable to earn abnormal returns by trading on private information.
D) a security's price at a particular time fully reflects both publicly and privately available information.