A company needs to connect seven of their Windows-based servers to a DS4000 storage server.   The DS4000 only has two host-side connections， and each server has two HBAs.  Which of the following is the lowest cost solution to provide no single points of failure？（）

• A、Implement two 8-port switches design with ISLs
• B、Implement two 16-port switches design with ISLs
• C、Implement two 8-port switches design without ISLs
• D、Implement two 16-port switches design without ISLs