where did i go wrong

Please determine which of the following statements are reasons why the Efficient Market Hypothesis is considered a credible explanation of asset valuation. Supports the Efficient Market Hypothesis Does Not Support the Efficient Market Hypothesis Major stocks are followed daily by money managers. So many factors are involved in stock valuation, and not all factors can ever be known, such that random chance selection becomes a valid tool through which to select stocks The number of people viewing the stock as undervalued will be about the same number as those who view it as overvalued, and so they balance one another out Supply and demand sets the market price