Refer to the Exhibit.
— Exhibit –user@router> show chassis environment
Class Item Status Measurement
Power Power Supply A OK
Power Supply B Absent
Temp FPC 0 OK 28 degrees C / 82 degrees F
FPC 1 OK 27 degrees C / 80 degrees F
Power Supply A OK 22 degrees C / 71 degrees F
Power Supply B Absent
SSB 0 OK 30 degrees C / 86 degrees F
Backplane OK 22 degrees C / 71 degrees F
Routing Engine 0 OK 26 degrees C / 78 degrees F
Routing Engine 1 Testing
Fans Rear Fan OK Spinning at normal speed
Front Upper Fan OK Spinning at normal speed
Front Middle Fan OK Spinning at normal speed
Front Bottom Fan OK Spinning at normal speed
Misc Craft Interface OK
— Exhibit –Referring to the exhibit, which two statements are true about the chassis? (Choose two.)

A.
Power Supply B is not installed in the system.

B.
Power Supply B is installed in the system but has failed.

C.
Routing Engine 1 has failed.

D.
Routing Engine 1 is installed in the system but is still initializing.

Explanation: