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.