Which two statements are true about the PMON background process? (Choose two.) 

Answer options:

A. It registers database services with all local and remote listeners known to the database instance
B. It frees resources held by abnormally terminated processes
C. It records checkpoint information in the control file
D. It frees unused temporary segments
E. It kills sessions that exceed idle time

AB

Reference: https://docs.oracle.com/cd/B19306_01/server.102/b14220/process.htm