A media company has made the decision to migrate a physical, internal file server to the cloud and use a web- based interface to access and manage the files. The users must be able to use their current corporate logins.
Which of the following is the MOST efficient way to achieve this goal?

A. Deploy a VM in a cloud, attach storage, and copy the files across.
B. Use a SaaS service with a directory service federation.
C. Deploy a fileshare in a public cloud and copy the files across.
D. Copy the files to the object storage location in a public cloud.