What is the value of standard deviation for the standardized p-chart for short production runs?

• A. ( sqrt{ frac{ bar{p}(1- bar{p})}{n}} )
• B. ( sqrt{ frac{ bar{p}(1+ bar{p})}{n}} )
• C. ( sqrt{ frac{ bar{p}( bar{p}-1)}{n}} )
• D. ( sqrt{ frac{ bar{p}(1- bar{p})}{2n}} )