if someone can please answer and explain id be much appreciated and upvoted, thanks!

An accountant has debited an asset account for $900 and credited a liability account for $1,200. There is one missing part of the transaction. Which of the following can be the missing part of the transaction? Credit a different liability account for $300. Debit a different asset account for $300. All of these can be a correct way to complete the transaction. Credit a stockholders' equity account for $300. None of these can be a correct way to complete the transaction