The planned load in a work center has always shown a distinct drop-off after the tenth or eleventh period. Reasons for this drop-off most likely include which two of the following?
I. Reduced customer demand
II. Failure to use planned orders in the load
III. Too short of a MPS horizon
IV. Too much work center capacity
A) I and II
B) I and III
C) II and III
D) III and IV