Answer:
C. salaries expense
D. service revenue
Step-by-step explanation:
All temporary accounts need to be closed off at the end of the year. Temporary accounts are accounts that both begin and end the period with a $0 balance so that they do not get mixed up with figures from the next period.
Items in the income statement such as revenue and expenses are closed at year end and will form part of the Retained earnings account as they would have been accounted for in the net income.
Salaries expense and service revenue will therefore be closed at the end of the year.