A project purchased a batch of TaiShan servers to expand the original distributed storage Ceph. Which of the following are the main steps for installing and deploying the object storage service? (Multiple choices)

A project purchased a batch of TaiShan servers to expand the original distributed storage Ceph. Which of the following are the main steps for installing and deploying the object storage service? (Multiple choices)
A . Create a rgw account
B . Create a storage pool
C . Create a file system
D . Create a rgw instance

Answer: ABD