Answer:
C. Unearned revenue would be debited for $700.
E. Service revenue would be credited for $700.
Step-by-step explanation:
As we recieve the payment in-advance we take the obligation to perform our duties with the customer.
Therefore it is unearned revenue (liability)
at year-end there is a portion which is still unearned by the amount of 300 dollars Hence, the difference was earned: 1,000 - 300 = 700
we will decrease our liability against the customer and recognize the revenue by crediting service revenue.