Which of the following has events of fertilization in the sea urchin in the correct order from earliest to latest?
a. Sperm contacts egg membrane, fusion of sperm and egg nuclei, formation of fertilization membrane
b. Fusion of sperm and egg nuclei, sperm contacts egg membrane, formation of fertilization membrane
c. Formation of fertilization membrane, fusion of sperm and egg nuclei, sperm contacts egg membrane
d. Formation of fertilization membrane, sperm contacts egg membrane, fusion of sperm and egg nuclei