On a Windows server with PowerPath installed, how is I/O routed to the non-owning SP of a LUN?

A.
I/O is balanced across active optimal paths for a given LUN.

B.
I/O is balanced across active paths using the First In, First Out algorithm.

C.
I/O is sent across all paths using the round-robin algorithm.

D.
I/O load balances across non-optimal paths for a given LUN.