Which of the following statements is wrong when comparing RDS with self-built database?
A. RDS features a high availability of 99.95% while self-built database requires you to implement data protection, primary-standby replication, and RAID all by yourself.
B. RDS provides automatic backup while self-built database requires you to prepare storage space for backup copies and regularly verify that these copies can be restored.
C. Self-built database supports quick deployment and elastic scaling.
D. RDS requires no O&M while self-built database requires a dedicated DBA for maintenance, which results in high HR cost.
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C