please choose the most correct answer for both questions.

21. When sending marketing materials Via email, which of the following is not an item that must be included in the email? A. Opt-out mechanism. B. Email account in \"From\" field. C. Telephone number for additional information. D. Nonmisleading subject line. 22. The CAN-SPAM Act currently applies, primarily, to what types of electronic messages? A. Where the primary purpose of the message is marketing. B. Where the primary purpose of the message is transactional. C. Where the primary purpose of the message is to cause irritation. D. Where the primary purpose of the message is pornographic