Answer: The answer is Option D, paid-in Capital—Stock Expired would be credited for $12,000.
Explanation: Option D is Right, i.e. Stock option expired would be credited for $12,000. Whenever a share option is expired then it is requiring to make a journal entry to relabel the equity as expired stock options for the balance sheet purposes. This helps managers and investors understand that they won’t be issuing stock to the employee at a discounted price in the future. For this purpose, it is requiring to make entry that debit the stock option equity account and credit the expired stock option equity account.