Which two statements about the Adaptive Services PIC are true? （）

A. The Adaptive Services PIC supports the Layer 3 service package by default.
B. The Adaptive Services PIC is required when using the secure shell to access an M-series router.
C. The Adaptive Services PIC can be configured for the Layer 2 and Layer 3 service packages simultaneously.
D. The Adaptive Services PIC can be configured for either the Layer 2 or the Layer 3 service package but not both at the same time.