Each of the Following Would Tend to Weaken the Efficient

Multiple Choice

Each of the following would tend to weaken the Efficient Market Hypothesis EXCEPT:

A) There is publicly available information that Boeing Aircraft has procured a contract to build 25 planes for the U.S.Government and the price of Boeing quickly goes up.
B) ACG,Inc.performed well for the past six months,but they just lost a major distribution contract,but the price of ACG stock continues to go up.
C) Louisville Slugger,Inc. ,gets a contract to supply bats for Little League play,a contract it never had before,and stock price remains stable.
D) Disney corporation,a growth company,opens a new theme park,which investors expect will do tremendously well,and the stock price stays stable,while Urban Electric Company,which has a set infrastructure,and generates 95% of its earnings from assets it owns,outperforms Disney.