12. Which of the following is the best description of the Central Limit Theorem? A. As the sample size n increases the distribution of the sample can be approximated closely by a normal curve. B. As the sample size n increases and if the population is normal, the distribution of the sample will be unbiased. C. As the sample size n increases the shape of the sampling distribution can be approximated closely by a normal curve. D. As the sample size n increases and if the population is normal, then the sampling distribution can be approximated closely by a normal curve. E. As the sample size n increases the standard deviation of the sample will be smaller