Answer:
d. a promissory note.
Step-by-step explanation:
A certificate of deposit is a product offered by banks in which people deposit an amount of money for a period of time to receive a specific interest rate.
A draft is a check that is guaranteed by the bank
An order to pay is an instruction given to the bank to transfer funds to a specific account.
A promissory note is a document in which a person commits to make payment for a specific amount on a certain date.
According to this, the instrument that Ewa signed is most likely a promissory note.