
Answer:
c. debit to Bad Debts Expense for $6,900.
Explanation:
Allowance for Doubtful Accounts  $1,100 credit balance,
Estimated Un collectibles         $8000 credit
Required Adjustment           $ 6900 credit
The adjustment to record bad debts for the period will require a
c. debit to Bad Debts Expense for $6,900.
Bad Debt Expense $ 6900 Dr
Allowance for Doubtful Accounts $ 6900 Cr
Alternatively if the allowance account had a debit balance the entry would have been posted adding the two amounts.