One choice for me is to study in a university in a large city rather than _______ in a small town. And another choice for me is _______ of studying abroad.

A．one; one

B．one; that

C．that; one

D．that; that

若要使“只有P，才非q”与“非P并且q”均真，那么P与q的取值情况是P为（），q为（）。