Service level is $\_\_\_\_\_\_\_\_\_\_.$

Question $9$ options:

A$)$

calculated as the cost of a shortage divided by $($the cost of shortage $+$ the cost of overage$)$

B$)$

the probability of stocking out

C$)$

the probability the service is satisfactory to the customer

D$)$

something that should be minimized in retail

E$)$

the probability of not stocking out $($demand does not exceed supply$)$ during lead time