About the software SACG And hardware SACG Description, which of the following is correct?

About the software SACG And hardware SACG Description, which of the following is correct?
A . hardware SACG use Any Office Perform admission control.
B. software SACG use Any Office Perform admission control.
C. hardware SACG Than software SACG cut costs.
D. hardware SACG The security is higher.

Answer: B