29. Tom and Sam are twin brothers. They study in different cities now, Tom in Taipei and Sam in Kaohsiung. One day, Tom cut his own little finger with a knife and it hurt a lot. Sam, at the same time, also felt the bad feeling even if he was quite far away from Tom. They have had this since they were born. What may this be betwecn Tom and Sam?
(A) They have telepathy.
(B) They have symphony.
(C) They have a telephone.
(D) They have an interview.