What could most likely be one of the reasons why market price fluctuates continuously even in a totally efficient financial markets with respect to all information?

A) All stock investments are zero net present value

B) The markets are continually reacting to old information as that information is absorbed.

C) Trading activity is limited to take advantage of the arbitrage opportunities

D) New information gets incorporated into prices E) None of the above since market price would not fluctuate in a totally efficient market.