Which type of 40 Gigabit Ethernet optics should be used for interconnect when the number of multimod

Which type of 40 Gigabit Ethernet optics should be used for interconnect when the number of
multimode fiber strands used should be kept as low as possible?

A.
40GBASE-SR4

B.
40GBASE-LR4-Lite

C.
40GBASE-SR-BiDi

D.
40GBASE-CR4