To ensure Kenny dresses appropriately for the international conference, here are the suitable attire options:
1. **Tuxedo (Option C):** A tuxedo is a formal outfit that would be fitting for such a significant event. It exudes elegance and sophistication, making Kenny stand out in a professional and polished manner.
2. **Business Formals (Option E):** Business formals, such as a well-tailored suit with a tie, are commonly accepted attire for international conferences. This attire portrays professionalism and respect for the event and the attendees.
Both a tuxedo (Option C) and business formals (Option E) would be excellent choices for Kenny to wear at the international conference as they align with the formal nature of the event and reflect a high level of professionalism.