Shortly after fertilization, successive cell divisions convert the zygote into a multicellular ...

Shortly after fertilization, successive cell divisions convert the zygote into a multicellular embryo during a process
  known as ____.
 
  a. meiosis
  b. parthenogenesis
  c. gastrulation
  d. cleavage
  e. blastulation

Question 2

Select the correct sequence of animal developmental events.
 
  a. fertilization >>> cleavage >>> organ formation >>>gastrula
  b. fertilization >>> cleavage >>> gastrula >>> organ formation
  c. fertilization >>> gastrula >>> cleavage >>> organ formation
  d. fertilization >>> organ formation >>> gastrula >>> cleavage
  e. fertilization >>> organ formation >>> cleavage >>> gastrula