Alibaba Cloud Object Storage Service (OSS) Is a Massive, Highly

Multiple Choice

Alibaba Cloud Object Storage Service (OSS) is a massive, highly available, secured and cost effective storage service. OSS is superior than self-built storage in all these aspects. Which of the following advantage relates to the high availability of OSS?

A) Availability actually relies on the underlying hardware, which can break down easily. Once the hard disk malfunctions, it can also lead to permanent data loss.
B) Data Reliability is not less than 99.99999999%. Data is backed up automatically with multiple redundant copies.
C) Data has to be backed up by customer manually, which is time-consuming and labor-intensive.
D) The following features are available: Multiple Authentication and Authorization mechanism, Whitelist, Anti-leech URL, and Master-Sub Account