Which of the following studies would not likely be characterized as eco-devo?

A) the study of a particular species to see whether or not it has developmental regulation
B) a study of the assortment of homeotic genes in the zebra
C) a comparison of the functions of a particular homeotic gene among four species of reptiles
D) studying the environmental pressures on developmental stages such as the tadpole
E) a fossil comparison of organisms from the Devonian era