（单选题）
What type of protection is implemented when the DBA issues the ALTER DATABASE SET STANDBY DATABASE PROTECTED； command？（）
AThe standby database is protected against write operations.
BThe primary database is protected against write operations.
CThe primary database is protected against data loss and data divergence.
DThe standby database is protected against data loss and data divergence.
正确答案
答案解析
略
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