Regarding the four disaster recovery modes of active-active, hot standby, warm standby, and cold standby, which of the following statements is wrong?
A. arm backup technology, when a data center failure causes the service to be unavailable, the service can be automatically switched to the backup data center within the specified RTO time
B. ctive-active technology can realize that both the active and standby data centers provide external services
C. he biggest feature of Multi Live is that it will not cause waste of data center resources, and data centers all carry application services
D. he hot standby service is responded by the main data center