Which ONE of the following will list the call_id's for all calls that both originate and terminate in a foreign switch. That is, whose originator and terminator are both trunks (as opposed to lines or treatments)? Select one: a. T[call_id] (TT[call_id, term](calls [orig=portid] trunks) ([term=portid] trunks) b. T[call_id](calls * trunks * trunks) C. T[call_id] (calls [orig=portid AND term=portid] trunks) d. o[call_id] (calls [orig=term] trunks) e. T[call_id] (calls [orig=term] trunks)