Which two statements about the Process Monitor (PMON) process are true? 

Answer options:

A. PMON performs process recovery when a client process fails.
B. During instance startup, PMON takes care of instance recovery.
C. PMON performs listener registration.
D. PMON restarts background and dispatcher processes when they fail.
E. PMON resolves failures of distributed transactions.

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http://docs.oracle.com/database/121/CNCPT/process.htm#CNCPT9840