Answer:
B. Debit Notes Receivable $4,000; credit Sales $4,000
Explanation:
Notice we are asked for hthe entry in the supplier's book:
The supplier will take the note thus, it will ahve a note receivable as in the future it expect to receive a cashflow.
The interest will be accrued over time, so are ignored for the moment
The supplier also has to recognize the amount of sales revenue earned with the sale.