A customer placed an order for an ArubaOS 5406R switch and plans to rack mount it in a wiring closet. The dimensions of the switch are 17.5 inches wide (44.45 cm), 6.9 inches high (17.5 cm), and 17.75 inches deep (45.1 cm).
How many rack units should a customer plan for this switch?
A . 5
B . 4
C . 6
D . 3
Answer: C