（单选题）
Your test database is running in NOARCHIVELOG mode. What are the implications of this？ （）
AYou can perform open database backups.
BYou can perform closed database backups.
CYou cannot perform schema-level logical backups.
DYou can perform the backup of only the SYSTEM tablespace when the database is open.
正确答案
答案解析
略
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