Final answer:
The correct journal entry records a debit to the treasury stock account because treasury stock represents a company buying back its shares. The total amount debited is the cost of the shares bought, which in this case is $200.
Step-by-step explanation:
When a company purchases its own shares, the transaction is recorded as treasury stock, which is a contra equity account. The shares were purchased for $20 per share and there were 10 shares bought.
Therefore, the total cost of the treasury shares is 10 shares × $20 per share, which equals $200. The correct journal entry would be a debit to the treasury stock account in the amount of $200.
The answer to the student's question is: A) Debit; $200