I selected all statements and got it wrong

Question 5 2 tries left Which of the following statement(s) about the history of transaction processing is(are) true? (Check all that apply.) A. Originally, people kept track of transactions using a single-entry accounting system. B. We used double-entry bookkeeping systems with journals and ledgers and paper-based financial reports for hundreds of years. C. When computers were invented, we digitized journals and ledgers and created transaction files and master files that did the job of paper-based journals and ledgers. D. When the number of master files proliferated, we combined multiple files into databases, which have grown much smaller and simpler