This OC Curve Represents a Sampling Plan Developed for a Lot

This OC curve represents a sampling plan developed for a lot size of 500,a sample size of 15,and an acceptance number of 2.The probability of acceptance for each of the first six points appears next to the plotted point.What is the average outgoing quality for an incoming fraction defective of 0.15?

A) less than 0.06
B) greater than or equal to 0.06 but less than 0.07
C) greater than or equal to 0.07 but less than 0.08
D) greater than or equal to 0.08