Research Has Shown That After-Sales Services Are Crucial in Building

Research has shown that after-sales services are crucial in building customer loyalty and maintaining company reputation. What is another key reason that after-sales services should receive particular attention of top management?

A) These services are almost always more profitable than the actual sale of the primary good itself.
B) These services are very difficult to duplicate.
C) These services can be very heavily advertised.
D) These services cost almost nothing.
E) Degree of outsourcing service support.