Which of the Following Would a Business Law Professor Most

Which of the following would a business law professor most likely identify as being the most important source of standards promoting public confidence in business products and services?

A) mandatory standards of Canadian Broadcast Standards Council
B) mandatory standards of the Competitions Act, R.S.C. 1985,c. C-34
C) voluntary standards of Advertising Standards Canada
D) voluntary standards of Canadian Association of Broadcasters