If an index excludes companies that earn revenues from gambling, the index is most likely...

Conduct-related exclusions (Option C) filter out companies based on unethical or controversial business activities, such as:

Gambling, tobacco, weapons, fossil fuels, and human rights violations.

Used in ESG-focused and socially responsible investing (SRI) indices.

Option A (Faith-based exclusions) are religion-specific (e.g., Islamic finance avoiding alcohol or pork-related businesses).

Option B (Idiosyncratic exclusions) refer to custom exclusions tailored to investor preferences, not general ESG norms.