Pick the most appropriate statement(s) about EMH and random walk hypothesis from the following list.

I. The weak form of EMH suggests that all known price information has already been discounted and therefore renders technical analysis pointless.

II. The semi-strong form of EMH suggests that all known private information has already been discounted and therefore renders the use of such information pointless.

III. The strong form of EMH suggests that all known private or public information has already been discounted and therefore renders the use of such information pointless.

IV. The random walk approach also implies that all known information is already incorporated into the current price.

Select one:

A. Only I and III are correct.

B. Only I, III, and IV are correct.

C. Only I, II, and III are correct.

D. All are correct.