Which of the Following Statements Is Correct About Cash Management

Which of the following statements is correct about cash management systems?

A) A lockbox system is useful in concentration banking.
B) A firm that has many divisions operating over a wide geographic area will find that payables centralization offers little benefit.
C) Disbursement float refers to the value of the checks deposited but the amount is not available in the account.
D) There are no actions a firm can take to improve its synchronization of cash flows.
E) Zero-Balance accounts help in managing the cash receipts of a firm.