A 1913 Law Known as the Gillett Amendment Has What

A 1913 law known as the Gillett Amendment has what effect on the practice of public relations?

A) it requires public relations professionals to abide by "truth in advertising" laws
B) it requires public relations agencies to protect the confidentiality of former clients
C) it established a government licensing program for the public relations profession
D) it requires PRSA and IABC to administer codes of ethics for their members
E) it prohibits government agencies from using taxpayer money to pay for promotional activities and legislative advocacy unless authorized by law