What is the least expensive option to install an IBM i operating system?

A customer decided to install an IBM i LPAR on an E870, which hosts AIX and VIOS partitions. The server does not contain a DVD Unit (#5771).

What is the least expensive option to install an IBM i operating system?
A . Install an IBM i partition using the existing NIM server.
B . Use the internal tape device to load IBM i.
C . Configure a vSCSI adapter and use the Virtual Media Repository.
D . Attach an external DVD drive via the USB port in front of the System Control Unit

Answer: C