Which server offers up to up to 384 GB of industry-standard DDR3 main memory in 48 DIMMs?

Which server offers up to up to 384 GB of industry-standard DDR3 main memory in 48 DIMMs?

A.
Cisco UCS C260 M1

B.
Cisco UCS C210 M1

C.
Cisco UCS C200 M1

D.
Cisco UCS C250 M1