Please help me with these questions! Thanks. Need them now

SER 21) A debit to Sales Returns and Allowances and a credit to Accounts Receivable Is not possible, it should be a credit to Sales Returns and Allowances and a debit to Accounts Receivable O Recognizes a cash discount taken by a customer Requires a debit memorandum to recognize the customer's return O Recognizes that a customer returned merchandise O All of the above 22) The difference between a company's gross profit on sales and total operating expenses is O Income from operations O Income summary O Net sale O Net loss O Profit