A Microsoft Office user who has been certified by Microsoft is called MOS. What is the full form of MOS ?

A Microsoft Office user who has been certified by Microsoft is called

1.	A Microsoft Office user who has been certified by Microsoft is called MOS. What is the full form of MOS ?
A.	Microsoft Office Special
B.	Microsoft Office Superior
C.	Microsoft Office Specialist
D.	Microsoft Office eSpecial
Answer» D. Microsoft Office eSpecial