The advertising of credence goods contains A. neither informational nor persuasive advertising, since the consumers are in genera wary of misieading advertisement. B. only informational advertising, so as to provide detailed information about the various features of the product. OC. only persuasive advertising, so as to induce the consumer to purchase this particular product OD. both informational and persuasive advertising, so as to provide detailed information and at the same time persuade the consumer to try the product O000