Which of the following is NOT a true statement about error in hypothesis testing? Choose the correct answer below. O A. The symbol a represents the probability of a type | error. O B. A type I error is making the mistake of rejecting the null hypothesis when it is actually false. O C. A type I error is making the mistake of rejecting the null hypothesis when it is actually true. O D. A type II error is making the mistake of failing to reject the null hypothesis when it is actually false