Secured debts must have

A. a mortgage

B. certified lenders

C. collateral

D. low interest rates

C. Collateral

Step-by-step explanation:

Secured debts are secured by an asset, such as a house or car. The asset serves as collateral for the debt (hence why it's called a "secured" debt). Lenders place a lien on the asset, giving them the right to seize (e. g., repossess or foreclose) it if you become delinquent.