Your boss at Certkil

Your boss at Certkiller .com wants you to clarify Oracle 10g. Which statement regarding the usage of redo log files during instance recovery is true？（）

• ATransactions are rolled back using redo log files.
• BTransactions are rolled forward using redo log files.
• CTransactions are rolled back using redo log files and archived log files.
• DTransactions are rolled forward using redo log files and rolled back using redo log files.