Which one of the following is not a requirement for effective inventory management?

a$.$ A system to keep track of inventory on hand

b$.$ All are requirements

c$.$ Reasonable estimates of holding, ordering and shortage costs

d$.$ A classification system for inventory itemsOrganizations that decided to outsource from another organization has the following disadvantage: a$.$ Increased risk of supply chain disturbance b$.$ Require high investment c$.$ Very risky especially when demand is unpredictable d$.$ Potential suppliers may offer superior products$/$services