Which network technology addresses these customer business needs: shrinking budgets and ITstaffs, more complex networks, and an increased need for network security?（）

A.it is A point product solution that addresses A single need
B.it provides customers with an opportunity to increase the number of devices in their network
C.it simplifies purchasing because there is only one model to choose.
D.it integrates multiple services into A single platform and reduces operating costs.

A.to provide users with A single device that permits access to information anywhere
B.to provide users with the same productivity and access to information no matter where are or which device they use
C.to eliminate the need for border security and firewalls
D.to provide companies with A way to extend their security and control over employees on the internet