The best answer is B. Liability deferral. Among the choices provided, this is the only option that relates to a liability-based arrangement in which an obligation is incurred and then settled over time. In accounting, debt that is taken on and repaid through scheduled installments is generally treated as a liability until it is extinguished through repayment. Repaying principal over time is commonly described in finance as amortization of debt principal, meaning the borrower fully pays the debt in installments over a period of time.

The other options do not fit this meaning. Income smoothing refers to managing the pattern of reported earnings to reduce fluctuations between periods, not simply borrowing and repaying debt. ''Profit control'' and ''accounting management'' are not standard terms for the repayment of debt over time in basic accounting frameworks. Because the question asks for the option that best matches the idea of incurring debt and then paying it off over time, Liability deferral is the most appropriate answer from the choices given, even though ''debt amortization'' would be the more standard term in practice.