A Client Erroneously Recorded a Large Purchase Twice

Multiple Choice

A client erroneously recorded a large purchase twice.Which of the following internal controls would be most likely to detect this error in a timely and efficient manner?

A) Footing the purchases journal.
B) Reconciling vendors' monthly statements with subsidiary payable ledger accounts.
C) Tracing totals from the purchases journal to the ledger accounts.
D) Sending written quarterly confirmations to all vendors.