One Reason Why Negative Customer Comments and Complaints Are Important

One reason why negative customer comments and complaints are important to an organization is that they can:

A) quickly be hidden from competitors
B) be used in future advertising campaigns
C) help the organization identify "problem" customers,who are then typically removed from mailing lists
D) bring to light unknown brand flaws
E) generate sympathy for the organization when consumers realize that "no one is perfect"