If in a F+ cell, a bacterial chromosome is crossed over with F factor, and then in the resulting Hfr cell, its chromosome is crossed over within itself. What would the resulting chromosome consist of?

A. A separate F factor and a bacterial chromosome.

B. Only bacterial chromosome.

C. Only F factor.

D. A bacterial chromosome and a F factor that consists of some bacterial genes.

E. F factor with some bacterial genes integrated in it.