Concept:Errors that affect the trial balance are corrected by recording entries in the journal before posting to the ledger.
Explanation:The journal is the book of original entry where all accounting transactions and corrections are first recorded.
When a trial balance is unbalanced, the accountant identifies the error and passes a correcting journal entry.
This entry adjusts the relevant accounts in the ledger.
Control accounts are used to verify subsidiary books and totals, not for general corrections.
The cash book records only cash and bank transactions.
The ledger contains accounts but does not act as the source for corrections.
Therefore, the correct book for rectifying trial balance errors is the journal.
Answer:D. journal