Mills Corporation's balance sheet included the following information:

Accounts Receivable	$550,000
Less: Allowance for Doubtful Accounts	70,000
Accounts Receivable, Net of Allowance	$480,000

If the Allowance account had a credit balance of $30,000 immediately before the year-end adjustment for bad debts and no accounts were written-off or allowed for during the year, what was the amount of Bad Debt Expense recognized during the year?

A.$70,000

B.$30,000

C.$35,000

D.$40,000