an adjusting entry prepared by a company after preparation of a Bank Reconciliation, credited Cash. This credit could be a result of the following?

a. all correct.

b. the company had incorrectly recorded cash sales of $2250 as $2520.

c. the company had incorrectly recorded a check received from a customer for $2250 as $2520.

d. the company had incorrectly recorded the payment for the purchase of supplies for $2520 as $2250.