Which of the following statements is a key characteristic of Global Investment Performance Standards (GIPS) （）
A. GIPS require managers to include all actual fee - paying and non - fee - paying discretionary portfolios in composites defined according to similar strategy and/or investment objective.
B. GIPS require firms to show GIPS - compliant history for a minimum of ten years, or since inception of the firm or composite if in existence less than ten years.
C. GIPS exist as a minimum worldwide standard where local or country - specific law, regulation, or industry standards may not exist for investment performance measurement and/or presentation.