You work as a database administrator for Supportcenter.cn. On a Monday morning， you find the database instance aborted. After inspecting the alert log file， you execute the STARTUP command in SQL*Plus to bring the instance up. What statement is true？（）

A. PMON coordinates media recovery.

B. SMON coordinates instance recovery.

C. PMON coordinates instance recovery.

D. Undo Advisor would roll back all uncommitted transactions.

E. SQL*PLUS reports an error with the message asking you to perform instance recovery.