Answer: c. To reduce the balances of revenue and expense accounts to zero so that they may be used to accumulate the revenues and expenses of the next period.
Explanation:
Closing entries are the journal entries that are made at the end of an accounting period in order to be able to transfer temporary accounts to the permanent accounts.
The primary purpose of closing entries is to reduce the balances of revenue and expense accounts to zero so that they may be used to accumulate the revenues and expenses of the next period.
Therefore, the correct option is C.