What Is Wrong with the Following Formula $S_{X}^{2}=\sqrt{\frac{\sum X^{2}-\frac{(\Sigma X)^{2}}{N}}{N}}$ A)The Symbol

Multiple Choice

What is wrong with the following formula?
$S_{X}^{2}=\sqrt{\frac{\sum X^{2}-\frac{(\Sigma X) ^{2}}{N}}{N}}$

A) The symbol $S_{X}^{2}$ indicates the sample variance, but the formula indicates the sample standard deviation.
B) The symbol $S_{X}^{2}$ indicates the estimated population variance, but the formula indicates the estimated population standard deviation.
C) The symbol $S_{X}^{2}$ indicates the sample variance, but the formula indicates the estimated population variance.
D) There is nothing wrong with the formula.