Home Works Referral Network is a premier home service referral network of dependable, highly skilled home improvement professionals who profile home service companies for homeowners looking for a contractor or handyman. To assure the companies they work with are reliable, they check licenses and insurance coverage, their record with the Better Business Bureau, and three trade references. The home service company also has to agree to a __________.

A. statement of cultural values
B. statement of values and beliefs
C. an industry endorsement
D. code of ethics
E. contract of vigilance