A security engineer is making changes to a corporate network to facilitate the expansion of corporate connectivity to guest users. The security engineer is concerned with unauthorized users accessing sensitive systems that also require network connectivity. Given the engineer's requirements, which of the following is the BEST method of securing the sensitive systems? OA Place the sensitive systems in an isolated VLAN. Place an air gap around the sensitive systems. Virtualize the guest wireless infrastructure Place the guest WAPs on a honeynet. O C. D