单项选择题

An administrator needs to install a 2U server into a rack. Which of the following shows how much space, in height, needs to be available for the server to fit in the rack?()

A.1.75 inches(4.45 cm)
B.2.5 inches(6.35 cm)
C.3.5 inches(8.89 cm)
D.4.25 inches(10.8 cm)

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