Unsecured loans are granted without specific collateral and are based primarily on the borrower's credit standing, reputation, financial strength, cash flows, and repayment capacity. The lender relies on the borrower' s general creditworthiness rather than a legal claim against pledged assets. Option A describes loan maturity, not security. An unsecured loan may be short-term or long-term. Option B is incorrect because unsecured loans are not automatically too risky; creditworthy borrowers often obtain unsecured financing. Option D is the opposite of unsecured lending because mortgaged assets create secured debt. Internal auditors reviewing financing arrangements should evaluate loan terms, covenants, collateral, interest rates, maturity, and compliance with borrowing authority. Therefore, Option C is correct.