(a) Why is the sampling distribution of xˉ approximately normal? A. The sampling distribution of xˉ is assumed to be approximately normal. B. The sampling distribution of xˉ is approximately nomal because the population is normally distributed C. The sampling distribution of x is approximately normal because the sample size is large enough. D. The sampling distribution of xˉ is approximately normal because the population is normally distributed and the sample size is large enough. (b) What is the mean and standard deviation of the sampling distribution of xˉ assuming μ=4 and σ=4​ ? μx​= (Round to three decimal places as needed.) σx​= (Round to three decimal places as needed.) (c) What is the probability a simple random sample of 60 ten-gram portions of the food item results in a mean of at least 46 insect fragments? P(xˉ24.6)= (Round to four decimal places as needed) Is this resuli unusunl? A. This result is not unusual because its probability is large B. This result is unusual because its probability is small C. This result is unusual because its probability is large. D. This result is not unusual because its probability is small. What might we conclude? A. Since this result is unusual it is not reasonable to conclude that the population mean is higher than 4 B. Since this result is unusual, it is reas onable to conclude that the population mean is higher than 4 C. Since this result is not unusual a is not rasonable to conclude that the population mean is higher than 4 D. Since-this result is not unusual, it is reasonable to conclude that the population mean is higher than 4.