Double entry

A debit balance of $3,000 brought down on A Co’s account in B Co’s books
means that: –
A. A Co is owed $3,000 by B Co
B. B Co has sold $3,000 of goods to A Co
C. B Co is owed $3,000 by A Co
D. A Co has sold $3,000 of goods to B Co

l consider that the correct answer is A

Because if debit balance of A co is 3000$
In that case,B co owes 3000$ to A (as receivable)
My answer and explanation are correct???