Audit director Marcus receives a call from the CFO of his SEC restricted audit client. The client is holding its annual industry update conference and the CFO asks Marcus to be a speaker at the event. Which of the following statements is correct?

Marcus can speak at the event as long as he also pays to attend the conference

Marcus can speak at the event if he is being paid for the speaking engagement

Marcus can speak at the event but not as the primary speaker, because the audit client routinely holds such events

Marcus should not speak at audit client events because it will be seen as a joint marketing arrangement