Answer:
the fish experienced an evolutionary change because of genetic drift
Explanation:
Just want my points sorry it’s probably A
B. inferior
because it is definitely not any of the others
I think the correct answer would be A. The yolk sac becomes the placenta. It is membranous sac that is attached to the embryo. It provides all the nutrition and the blood cells needed by the embryo. It is also called the umbilical vesicle.