You Are Implementing a Virtual Chassis Fabric Using QFX5110 Devices

You are implementing a Virtual Chassis Fabric using QFX5110 devices. Which two statements are true in this scenario according to Juniper Networks recommendations? (Choose two.)

A) Spine devices must assume the RE role.
B) Leaf devices must have a direct link to all other leaf devices.
C) Spine devices must assume the line card role.
D) Leaf devices must have a direct link to all spine devices.