A trial balance would only help in detecting which one of the following errors?

A trial balance would help detect all of these errors.

For a given transaction, the account that should have been debited was debited but no account was credited

A debit to retained earnings was debited to common stock by mistake

For a given transaction, the account that should have been debited was credited and the account that should have been credited was debited

A journal entry that is posted twice