The St Helena Heritage Center at Marquette, Michigan, Wants to Start

The St. Helena Heritage Center at Marquette, Michigan, wants to start analyzing their company's customer service quality. For each type of service the center provides, there are 6 types of customer complaints. During the last 12 months, the center had 8,876 visitors and received a total of 1,253 complaints.
-What is the center's DPMO for the past 12 months?

A) 43
B) 1,853,605
C) 11,806
D) 23,528
E) 5,395