We know that demand is NOT certain. Assuming demand is normally distributed, what would you anticipate your customer service level to be if you set your reorder point $($ROP$)$ equal to the average amount of demand expected during the lead time period $($average

DDLT$)$ plus add some safety stock $($SS$)?$

a Very close to $100\%$

b About $50\%$

c Between $50$ to $100\%$

d Cannot be determined based on the information given

e Between $0$ to $50\%$