Which access-layer device is capable of low-latency 40 Gb Ethernet switching?

Which access-layer device is capable of low-latency 40 Gb Ethernet switching?

A.
Cisco Nexus 5596UP

B.
Cisco Nexus 4000

C.
Cisco Nexus 3016

D.
Cisco Nexus 2232

E.
Cisco Nexus 2248