The correct answer is: A. Book of entries.
A journal is a book of original entry, which means that it is the first place where financial transactions are recorded. Journal entries are recorded in chronological order, and they provide a detailed description of each transaction.
A T account is a simple way of representing a financial account. It consists of two columns, one for the debit balance and one for the credit balance. The total of the debits must equal the total of the credits.
A book of economic events is a more general term for any book that records financial transactions. This could include a journal, a ledger, or a trial balance.
In conclusion, a journal is also referred to as a book of entries because it is the first place where financial transactions are recorded.