A new treatment for a certain disease is claimed to be effective in more than 80 % of cases . To test this claim the treatment was given to 100 randomly selected patients . The treatment was effective in 85 out of the 100 patients . What is the conclusion at a 5 % level of significance ? A.  Reject the null hypothesis .There is sufficient evidence to claim that the treatment is effective in more than 80 % of cases B.  Reject the null hypothesis .There is not sufficient evidence to claim that the treatment is effective in more than 80 % of cases C.  Fail to reject the null hypothesis. There is sufficient evidence to claim that the treatment is effective in more than 80 % of cases D.  Fail to reject the null hypothesis. There is not sufficient evidence to claim that the treatment is effective in more than 80 % of cases

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