The LEED AP is searching the Addenda Database for LEED Interpretations that pertain to Sustainable...

When attempting the Sustainable Sites Credit for Light Pollution Reduction in a LEED project, the LEED Interpretations that must be used are those published before the project's registration date that apply to the project's rating system. This means that the correct answer to the question is "C: Sustainable Sites Credit, Light Pollution Reduction LEED Interpretation published before the project's registration date that applies to the project's rating system."

LEED Interpretations provide clarification on how credit requirements can be applied to project-specific situations. They are part of the formal guidance offered by the USGBC and are meant to help project teams understand how to implement LEED credits in the context of their specific projects. It's important to use interpretations that are relevant to the specific credit being attempted and that were available at the time the project was registered, ensuring that the guidance aligns with the version of LEED under which the project is registered. Interpretations published after a project's registration date might contain new information or clarifications that were not considered at the time of registration and therefore may not be applicable to projects registered before their publication.