EMH -confused semi-strong and strong hypothesis, efficient, developed, companies, investment

richer

Question

An Analyst with ABC investment has developed a stock selection model based on earnings announcement made by companies with high P/E stock. the Model predicts that investing in companies with P/E ratio twice that of their industry average that make positive earnings announcements will generate significant excess return . If the analyst has consistently make superior risk- adjusted return on this strategy , Which form of the efficient market hypothesis has been violated?

A, weak form only
B, semi-strong and weak form only
C, Strong, semi-strong and weak forms

In my thought, if it breach weak form of EMH it will also breach semi-strong and strong , so i go with C but it is incorrect answer

what do you think abt it ?


many thanks