Answer:
C. password
Step-by-step explanation:
A transaction is a business activity that involves buyers and sellers. the se two parties agree to exchange goods and services for money. Everyone needs to be on the same page when this happens ; meaning, the sellers should be willing to give out their goods and services and the buyers should be willing to to pay for the what they are interested in. A complete transaction also requires a receipt which is a proof of the exchange . Therefore, having a password is not the only requirement for a transaction.