ESG indexes (e.g., MSCI ESG Leaders Index, FTSE4Good Index, S&P ESG Index) offer investors structured, rules-based exposure to companies that meet specific ESG criteria.
Why C is correct:
ESG indexes follow clear methodologies that determine which companies are included or excluded.
Transparency is a key feature—investors can access index construction rules, ESG scoring criteria, and weightings.
Why not A?
ESG scoring methods vary across index providers (MSCI, S&P, FTSE, etc.), meaning there is no universal “standardized” approach.
Why not B?
ESG indexes do not directly "identify" firms prioritizing sustainability—they include firms based on ESG ratings and predefined metrics, but inclusion does not necessarily mean a company prioritizes sustainability over profits.
References:
MSCI ESG Indexes Methodology
FTSE Russell: ESG Index Construction and Transparency Guidelines