Government National Mortgage Association pass-through certificates, commonly called Ginnie Mae pass-throughs, pay principal and interest to investors monthly. These securities represent interests in pools of mortgages. As homeowners make monthly mortgage payments, the principal and interest are passed through to certificate holders after servicing and guarantee-related processes. Choice A is correct. Quarterly, semiannual, and annual payment schedules do not match the standard cash-flow structure of mortgage pass-through securities. This monthly payment pattern differs from many traditional bonds, which commonly pay interest semiannually and principal at maturity. Mortgage-backed securities also expose investors to prepayment risk because homeowners may refinance or pay off mortgages early, especially when interest rates decline. The SIE outline includes agency securities, asset-backed securities, mortgage-backed securities, interest, principal, prepayment risk, and debt instrument characteristics. The question tests a basic product feature: mortgage-backed pass-through securities distribute monthly cash flows because the underlying mortgage loans are paid monthly. Reference: Section 2.1.2 Debt Instruments; agency, asset-backed, and mortgage-backed securities; Section 2.2 Investment Risks, prepayment risk.