Which statement about cloning by somatic cell nuclear transfer is false?

a. somatic cell nuclear transfer was first carried out in frogs in the 1950s.
b. the nucleus of an adult somatic cell is transferred to an enucleated, unfertilized egg.
c. in the laboratory, the cloned egg is cultured to an early embryo stage and then transferred to a foster mother.
d. the cloned embryo is genetically identical to the foster mother.