Which of the following statement about OSS backup is correct?

Alibaba Cloud Object Storage Service (OSS) is a massive, highly available, secured and cost effective storage service. One of the special characteristics of OSS is its superior data reliability, because of its underlying backup technology and policies.

Which of the following statement about OSS backup is correct?
A . OSS supports 3 internal data copies, so the data can be manually recovered should there be any problem.
B. Customer has to safeguard their own data. OSS provides various backup interfaces to facilitate offsite backups.
C. OSS leverages RAID0+1 configuration of its underlying physical hard disks. There is no impact even if 2 hard disks were to fail simultaneously.
D. OSS supports 3 internal data copies, no human intervention is required to recover the data when anything goes wrong.

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Answer: B