Which of the Following Is True of the Efficient Markets

Which of the following is true of the efficient markets hypothesis?

A) The efficient markets hypothesis summarizes the idea of efficient markets as markets in which prices fully reflect available information.
B) The efficient markets hypothesis summarizes the idea of efficient markets as markets in which both systematic and unsystematic risk can be completely eliminated.
C) The efficient markets hypothesis only applies to large multinational corporations which have both systematic and unsystematic risk.
D) The efficient markets hypothesis states that the expected return of a financial asset is a linear function of various macro-economic factors.