Which of the Following Is a Difference Between Trade and Non-Trade

Which of the following is a difference between trade and non-trade receivables?

A) Trade receivables are generally recorded using present value techniques versus non-trade receivables, which are generally recorded using market interest rates.
B) Trade receivables are generally outstanding for long periods of time versus non-trade receivables, which are generally outstanding for short periods of time.
C) Trade receivables are generally verbal contracts versus non-trade receivables, which are generally written contracts.
D) Trade receivables are generally verbal contracts versus non-trade receivables, which are generally constructive contracts.