The three economic functions of financial intermediaries are:

• A. to guarantee positive investment returns; to reduce risk through diversification;to reduce the costs of contracting and information processing
• B. to provide maturity intermediation; to reduce risk through diversification;to reduce the costs of contracting and information processing
• C. to provide maturity intermediation; to reduce risk through diversification;to guarantee positive investment returns
• D. to provide maturity intermediation; to guarantee positive investment returns; to reduce the costs of contracting and information processing