The correct answer is: C. Frequently during the accounting period.
A journal is a book of original entry in which all business transactions are recorded in chronological order. The process of recording in a journal is called journalizing. Journalizing is done frequently during the accounting period, as soon as a business transaction occurs. This allows businesses to keep track of their financial activity on a daily basis and to prepare financial statements on a timely basis.
Option A is incorrect because businesses typically journalize transactions more than twice a year. Option B is incorrect because businesses typically journalize transactions more than once a year. Option D is incorrect because businesses typically journalize transactions before the end of an accounting period.