Answer:
d.No effect on the expenses of the current period.
Step-by-step explanation:
In the case when the credit balance of the allowance for doubtful debt more than the bad debt amount i.e. written off
So the entry for writing off against the allowance would result in no effect on the expense for the present period
As the bad debt expense is debited and the allowance for doubtful debt would be credited therefore the option d is correct