Referring to the text, which of the following are true in regards to system nervousness?
a. It describes the potential impact of “re-planning” to MRP systems
b. It can be reduced by establishing “time fences” in the schedule
c. Firms with limited product offerings do not have system nervousness
d. It describes disruption to a firm’s production and purchasing processes
e. Outsourcing production eliminates system nervousness
I. a, b, e
II. a, c, d
III. a, b, d
IV. c, d, e
V. a, d, e