What is single pane of glass management?

A.
Management of all monitors on the network at the same time

B.
Complete set of security solutions that address sophisticated security threats

C.
Unified communication between wired and wireless connections

D.
Single-point network management with visibility across entire networks

Explanation:
http://h30507.www3.hp.com/t5/Converged-Infrastructure/A-single-pane-of-glass-viewof-storage-resources-from-HP-at-MMS/ba-p/135163#.UpN7smQmlqc(first para)