Answer:A. allows managers to use the normal distribution as the basis for building some control charts.
Explanation: The central limit theorem which states that the distribution of sample means around a population is approximately a normal distribution which is usually shown in the graph as a BELL CURVE.
In other words it can be stated as that a sufficiently large amount of sample will have the same mean and the population mean if the variance of the sufficiently large sample size has a finite variance.
