Please what is the correct answer to this question

INEn. Various 17. Which of the following statements contains an obvious error? (A) "The data set had no outliers, so the quantile boxplot and the outlier boxplot were identical." (B) "The correlation between the number of hours students studied and their final letter grade was calculated to be r = 0.78." (C) "Even though a simple random sample was selected, two-thirds of the individuals in the sample were female." (D) "The experiment was double-blind, so even the doctor had no idea whether the patient was receiving the actual medication or a placebo." (E) "A variable X follows a normal distribution with mean u = -7 and standard deviation o = 5."