After I fought in Russia , we went to Las Vegas for one of the fights and he gets mobbed and I ' m like " oh , he 's a celebrity , I did n't know that . " So , yeah , I ' m kind of dumb . What 's one of the hardest things he puts you through when you 're preparing for a fight ? JK : I guess a lot of our mental training , like you saw us running on copper hill and stuff like that . We also do like , we run up sand dunes , so I think that a lot of it , the hard parts are the mental parts .

Available options:
(1). None of the above choices .;
(2). They are performing an act together .;
(3). They are performing an interview .;
(4). They are on the same team .;
Answer the following question: What may be the reason for them asking this personal all these questions ?
(3).