Radio Moscow Industries Purchased Supplies for $1,000

Radio Moscow Industries purchased supplies for $1,000. They paid $400 in cash and agreed to pay the balance in 30 days. The journal entry to record this transaction would include a debit to an asset account for $1,000, a credit to a liability account for $600. Which of the following would be the correct way to complete the recording of the transaction?

A) Credit an asset account for $400.
B) Credit another liability account for $400.
C) Credit the retained earnings account for $400.
D) Debit the retained earnings account for $400.