b. the first stage because it could never be in the secound stage
Answer:
B
Explanation:
I hope this helps!!! I am very sorry if it was wrong though!!!
<span>Opaca and Marginal zone stays outer and does not move during chick gastrulation,
The zone opaca is a thick fringe ring comprising of more than one cell, it is joined to the germ wall. The Marginal zone lies at the fringe between the range opaca and the region pellucida</span>
