A registered representative generally must provide prior written notice to the employing firm before engaging in outside business activities for compensation. However, passive investments are not treated as outside business activities requiring notice in the same way because the representative is not actively working, providing services, or being compensated for an external business role. Choice B is correct. Playing in a band for compensation is an outside business activity because the representative is actively performing services for income outside the member firm. Teaching woodworking at a local high school is also an outside compensated activity and would require notice. Appearing as a guest speaker on investments may involve compensation, securities-related content, public communications, and potential conflicts; it would require firm review and notice. The SIE outline expressly includes outside business activities, private securities transactions, employee conduct, and reportable events. FINRA Rule 3270 is specifically listed as the outside business activities rule. The regulatory concern is that outside compensation and business roles can create conflicts, supervision issues, reputational risk, or unauthorized securities activity. Passive investment income does not present the same active outside employment concern. Reference: Section 4.2.2 Reportable Events; FINRA Rule 3270 Outside Business Activities of Registered Persons.