The Common Stock of Repeat Company Has Increased in Value

The common stock of Repeat Company has increased in value every spring for the past five years and then decreased back to its original value every fall. If the market is weak-form efficient, then:

A) knowing the past trends of the stock's price will not produce excess returns in today's market.
B) trading on the past pricing trends of the firm will produce excess returns.
C) having this knowledge can yield abnormal returns.
D) the market is inefficient in respect to this information.
E) no excess profits can be earned on this stock.