On March 1, a retailer borrowed $30,000 from its bank, and signed a 6%, 10-month promissory note. Principal and accrued interest are due on January 1. If the retailer's year end is July 31, the year end adjusting entry to record interest would be: Select one: O a. debit Interest Receivable, $900; credit Interest Revenue, $900. O o b. debit Interest Expense, $1,800; credit Interest Payable, $1,800. c. debit Interest Expense, $600; credit Interest Payable, $600. d. debit Interest Expense, $750; credit Interest Payable, $750. e. debit Interest Receivable, $1,500; credit Interest Revenue, $1,500. O 0