Final answer:
The adjustment to record bad debts for the period will require a debit to bad debt expense for $5,800. Therefore, the correct option is C.
Step-by-step explanation:
The adjustment to record bad debts for the period will require a debit to bad debt expense for $5,800.
To calculate the adjustment, we can start with the uncollectible amount of $9,000 and subtract the existing credit balance in the allowance for doubtful accounts, which is $3,200. This gives us $5,800, which represents the additional amount that needs to be recorded as bad debt expense.
Therefore, option C is the correct answer.