What will happen to a call that is transferred when no second line is available?

You are CCNA VOICE associate in Certkey.com. What will happen to a call that is transferred when no second line is available?
APSC(config-telephony-service)#transfer-system full-consult

A.
The call will be terminated

B.
The call will be transferred without consultation using H.450.2 standard methods.

C.
The call will fall back to a full-blind transfer.

D.
The call will be transferred without consultation using the proprietary Cisco transfer method.