In the Management of Logistical Activities, the Performance Variable(s) of Prime

In the management of logistical activities, the performance variable(s) of prime interest (is) are:

A) number of products handled.
B) total distribution costs.
C) inventory movement per warehouse facility.
D) the level of logistical service provided to customers.
E) both number of products handled and the level of logistical service provided to customers.