You have been tasked with designing an Ethernet network. Your client needs to implement a very high-speed network backbone between campus buildings, some of which are around 300 meters apart. Multi-mode fiber optic cabling has already been installed between buildings. Your client has asked that you use the existing cabling. Which Ethernet standard meets these guidelines?
A. 1000BaseSX.
B. 10BaseFL.
C. 10GBaseSR.
D. 1000BaseCX.
E. 10GBaseER.
F. 1000BaseT.