Among the statements given below,which statement is correct on the basis of the observations of Ernst Haeckel?

• A
  Embryos never pass through the adult stages of other animals.
• B
  Certain features during the embryonic stage are common to all vertebrates but are absent in adults.
• C
  Similarities in proteins and genes performing a given function among diverse organisms.
• D
  Homologous structures are a result of convergent evolution.