单选题While connected to the database，a user on a PC receives a fatal error and the machine reboots. Which background process cleans up the failed connection？（）A ARCnB CKPTC DBWnD LGWRE PMONF SMON
题目
单选题
While connected to the database，a user on a PC receives a fatal error and the machine reboots. Which background process cleans up the failed connection？（）
A
ARCn
B
CKPT
C
DBWn
D
LGWR
E
PMON
F
SMON