At year end, the balance in A/R is $525,000, of which 4% is estimated to be uncollectible. The Allowance for Doubtful Accounts has a debit balance of $7,000 before adjustment. The journal entry necessary to record bad debt expense is:

		debit Bad Debt Expense for $21,000; credit Allowance for Doubtful Accounts for $21,000
		debit Allowance for Doubtful Accounts for $21,000; credit Bad Debt Expense for $21,000
		debit Allowance for Doubtful Accounts for $7,000; credit Bad Debt Expense for $7,000
		debit Allowance for Doubtful Accounts for $28,000; credit Bad Debt Expense for $28,000
		debit Bad Debt Expense for $7,000; credit Allowance for Doubtful Accounts for $7,000
		debit Bad Debt Expense for $28,000; credit Allowance for Doubtful Accounts for $28,000