The correct answer is Michigan/ LSD. This suggests that the Mayfair Condo, also known as Mayfair Regent Hotel, is located at the intersection of Michigan Avenue and Lake Shore Drive (LSD). Michigan Avenue is a major street in Chicago, known for its high-end shopping and iconic landmarks, while Lake Shore Drive is a scenic road that runs along the shoreline of Lake Michigan. This intersection is likely a prime location for the Mayfair Condo, offering convenient access to both the downtown area and the lakefront.