Embryos of different animals show patterns of similarities. What is this evidence for?

a
that these animals all have very similar DNA
b
that these animals all have the same physical structures
c
that these animals evolved from a common ancestor
d
that these animals have linear relationships

c. that these animals evolved from a common ancestor. The similar patterns of early development in embryos of different animals suggest that these animals share a common ancestor and have evolved from a single common ancestor over time.