单选题Which statement must you issue to an already-running Automatic Storage Management （ASM） instance to prevent database instances from connecting to the ASM instance？（）A ALTER SYSTEM KILL SESSIONB ALTER SYSTEM DISCONNECT SESSIONC ALTER SYSTEM QUIESCE RESTRICTEDD ALTER SYSTEM ENABLE RESTRICTED SESSION
单选题
Which statement must you issue to an already-running Automatic Storage Management （ASM） instance to prevent database instances from connecting to the ASM instance？（）
A
ALTER SYSTEM KILL SESSION
B
ALTER SYSTEM DISCONNECT SESSION
C
ALTER SYSTEM QUIESCE RESTRICTED
D
ALTER SYSTEM ENABLE RESTRICTED SESSION
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