Working in an experimental fertility clinic, a researcher removes one cell in an 8-cell stage chimpanzee embryo. What is the likely result? 
 A. Both the cell and the blastula will die. 
 B. The removed cell can develop into a viable chimp. 
 C. All the cells are already committed and therefore are not viable. 
 D. The embryo from which the cell was removed still remains viable and can form a normal chimp. 
 E. Both can be implanted and will result in identical twin chimps