Which of the following products would you expect to require…

Which of the following products would you expect to require the most safety stock?Product A: Standard Deviation of Sales = 15, Standard Deviation of Lead Time = 15Product B: Standard Deviation of Sales = 20, Standard Deviation of Lead Time = 10Product C: Standard Deviation of Sales = 10, Standard Deviation of Lead Time = 20Product D: Standard Deviation of Sales = 25, Standard Deviation of Lead Time = 20