Good Housekeeping Magazine Places Its "Seal of Approval" on All

Good Housekeeping magazine places its "Seal of Approval" on all the products advertised in it.If any of the products are later found to be defective,Good Housekeeping promises to refund the money paid for the products.This kind of careful screening:

A) is required by the Federal Trade Commission.
B) is a way for a medium to monitor its advertisements.
C) was required by legislation passed during the Great Depression, and Good Housekeeping has continued the practice.
D) is used by most print media, including the tabloids.
E) is redundant given the watchfulness of federal regulatory agencies.