What Evidence Would Not Suggest That the Fluid in the Nucleus

Multiple Choice

What evidence would not suggest that the fluid in the nucleus is different from the cytoplasm?

A) There is a pH difference between the two fluids.
B) The nuclear membrane encloses the nucleoplasm.
C) Nuclear pores only permit passage of certain molecules into and out of the nucleus.
D) Cytoplasm and nucleoplasm both flow freely into and out of the nucleus.
E) Electron microscopy reveals nonmembranous components associated with the nuclear pores.