In the Area of Maintenance, the Pareto Phenomenon Is Reflected

In the area of maintenance, the Pareto phenomenon is reflected in the fact that:

A) All equipment justifies about the same expense.
B) A majority of equipment will justify considerable expense.
C) A few pieces of equipment will justify little expense.
D) A few pieces of equipment will justify considerable expense.
E) No piece of equipment will justify major expense; it's better to replace.