Which switch family belongs in the modular chassis product line and includes QoS, integrated Layer 3

Which switch family belongs in the modular chassis product line and includes QoS, integrated
Layer 3 features, and high availability?

A.
HP 3500 Switch Series

B.
HP 3800 Switch Series

C.
HP 5400 ZI Switch Series

D.
HP 5500 HI Switch Series