Answer:
c. Debit Unearned Subscriptions $13,800; credit Subscriptions Income $13,800
Step-by-step explanation:
Based on the information given the correct appropiate adjusting entry at December 31, 20X1, is to Debit Unearned Subscriptions $13,800 and Credit Subscriptions Income $13,800
December 31, 20X1
Debit Unearned Subscriptions $13,800
Credit Subscriptions Income $13,800
(3/12*$55,200=$13,800)
(October 1 to December 31 will gives us 3month)