A, B, C, D and E travel on high-speed rail and they happen to be sitting in the same row of A.B.C.D.F seats. It is known that: (1) if one of A or B sits in seat C, C sits in seat B; (2) if E sits in seat C, D sits in seat F.
sitting in seat B, which of the following options can be determined?
A is sitting in seat A.