A single cell, the zygote, can develop into an entirely new organism with many different specialized cells. Wh?

A.  Additional genetic information for the formation of specialized cells is passed on to the developing embryo via the placenta.  
   B.  The descendant cells specialize by a process known as cellular differentiaton.  
   C.  The zygote contains all of the genetic information required for the development of many different cell types.  
   D.  Only some of the genes in the zygote are expressed in all of its descendant cells.  
   E.  Differentiation of the zygote into a multicellular organism results from selective gene expression.