25. (5%) Suppose we are interested in the rate (p) of Cancer A in rats that have been fed with a diet consisting of high saccharin (糖精). We fed this diet to 20 rats and found that I rat developed cancer. The study goal is to claim that the cancer rate is higher than 5%. Which of the following statement is INCORRECT?
(A) The claim can be statistically confirmed by performing the hypothesis testing: 

Ho:p ≥ 0.05 v.s.H₁ :p ＜ 0.05
(B) The sample proportion follows a normal distribution approximately
(C) Based on the sample proportion = 1/20, the hypothesis testing (with type I error 0.05) cannot conclude that the cancer rate is higher than 5%
(D) The estimation error of   for estimating p is approximately
(E) If such an experiment can be repeated independently many times, the number of rats (out of 20) developing cancer follows a Poisson distribution approximately