Blimp Corporation uses the allowance method to account for uncollectible receivables. At the beginning of the year, Allowance for Bad Debts had a credit balance of $$1,200.$ During the year Blimp Corporation wrote off uncollectible receivables of $$2,100.$ Blimp Corporation recorded Bad Debts Expense of $$3,300.$ What is Blimp Corporation's year$-$end balance in Allowance for Bad Debts?

A$.$ $$5,400$

B$.$ $$4,500$

C$.$ $$1,200$

D$.$ $$2,400$