Which Provides Evidence of the Ability of Cells to Become

Which provides evidence of the ability of cells to become specialized?

A) Replacing the nucleus in a sheep's cell with the nucleus from a mouse cell results in a cell with characteristics of a mouse cell.
B) Cells removed from a multicellular animal can undergo cell division in culture dishes indefinitely when provided a continued source of nutrients.
C) Cells from a mouse embryo can be isolated and used to repair an injury in the central nervous system of an adult mouse.
D) A virus can infect a human cell and insert some of its DNA into a human chromosome, where it will be replicated and carried along during division of the human cell.
E) Mouse cells grown in culture dishes undergo cell division at a slower rate at temperatures colder than 37°C.