Choice "A" is correct. To audit the statement of cash flows, the auditor reconciles the amounts on the statement to amounts on other financial statements.
Choice "c" is incorrect. Comparison of amounts on the cash flow statement with those of the previous period is an analytical procedure that is not commonly used to audit the statement of cash flows, since sources and uses of cash in the current year are not necessarily predictable based on sources and uses from the prior year.
Choice "b" is incorrect. Reconciling the cutoff bank statement is a procedure used to audit the cash balance, rather than the statement of cash flows.
Choice "d" is incorrect. Vouching all bank transfers is a procedure used to audit the cash balance, rather than the statement of cash flows.