The advertisement is a "blind ad" and violates Pennsylvania Real Estate Commission regulations. According to these rules, any advertisement placed by a salesperson or associate broker must contain the business name and telephone number of their employing broker as it appears on the broker's license. The provided ad lists the salesperson's name, John Doe, but completely omits the name of the brokerage, ABC Realty, which is a clear violation.

A. No address is given.

Pennsylvania law does not mandate that a specific property address be included in every real estate advertisement.

B. The salesperson's name appears in the ad.

It is permissible for a salesperson's name to be in an ad, but the employing broker's name must also be included and be more prominent.

D. The MLS number is not included in the ad.

There is no state-level requirement under the Pennsylvania Real Estate Licensing and Registration Act (RELRA) to include an MLS number in advertisements.

1. Pennsylvania Code, Title 49, Chapter 35, § 35.305. Business name on advertisements.

Section (b): "An advertisement by a salesperson or associate broker shall contain the business name and telephone number of the employing broker. The name and telephone number of the employing broker shall be given greater prominence in the advertisement than the name and telephone number of the employee." This directly supports that the broker's name (ABC Realty) is required, making its omission a violation.

2. Pennsylvania Real Estate Licensing and Registration Act (RELRA), 63 P.S. § 455.604. Prohibited acts.

Section (a)(6): This section prohibits "Placing a 'for sale' or 'for rent' sign on or advertising any property without the written consent of the owner..." While not the primary violation here, the body of advertising law under RELRA is built on clear disclosure, and a blind ad fails this principle by obscuring the responsible broker. The specific rule is found in the Commission's regulations (Title 49).

3. Real Estate Education and Community Housing (REECH) Program, Temple University. Course materials for Pennsylvania Real Estate Salesperson licensing frequently cite the prohibition of blind ads as a key regulatory point.

Module on Real Estate Advertising: "All advertising must be done under the direct supervision of the broker and must include the broker's business name and phone number as registered with the Commission. Failure to include the broker's name constitutes a prohibited blind ad." This aligns with the reasoning for selecting option C.