Answer: a. credit to Prepaid insurance for $400.
b. debit to Insurance expense for $400
Step-by-step explanation:
The required adjusting journal entry on December 31 will be:
Debit Insurance expense = ($4800 *1/12) = $400
Credit Prepaid Insurance = $400
(To record insurance expired for 1 month for December)
Therefore, the correct options are A and B.