Ques By studying the standard deviation formula, given below, explain why the standard deviation of a set of data will always be greater than or equal to 0. (x-x) $= n-1 Choose the correct answer below. OA. The values of (x-x)2 will always be greater than or equal to 0. B. The mean, x, will always be greater than or equal to 0. OC. The values of x will always be greater than or equal to 0. OD. The values of x-x will always be greater than or equal to 0.