Final answer:
The most suitable LEED rating system for a mixed-use building with retail, residential, and a pre-kindergarten facility is LEED BD+C: New Construction, which covers a wide range of uses for newly constructed or majorly renovated buildings.
Step-by-step explanation:
When considering the appropriate LEED (Leadership in Energy and Environmental Design) rating system for a mixed-use building that includes retail space, residential condominiums, and a pre-kindergarten learning facility, it's important to choose the system that broadly encompasses all the different uses of the building. LEED BD+C: New Construction is the most suitable for projects that are new constructions or major renovations, which include both residential and non-residential spaces and give a comprehensive approach to sustainability.
LEED BD+C: Schools caters to K-12 school projects, LEED BD+C: Retail is specific to retail spaces, and LEED ID+C: Commercial Interiors is for projects that are a complete interior fit-out. Since this project involves designing new construction with varied uses, the correct option is C. LEED BD+C: New Construction.