Refer to the exhibit. Why is the state of the serial0/0/0 interface administratively down?

Refer to the exhibit. Why is the state of the serial0/0/0 interface administratively down?

An IP address has not been configured on the interface.
The WIC was installed into the incorrect slot on the router.
The default encapsulation on the interface has been modified.
The no shutdown command has not been executed on the interface.