Answer:
Option A, cladograms
Step-by-step explanation:
Cladogram is basically a tool that is used to represent the phylogenetic relationship between organisms. Here the organisms are represented in a diagram with a hypothetical relationship among them . It has no contribution in the change of morphology, analogy or genotype of any of the organsim represented in it. Hence, cladogram is just a method to study the relationship between organism.
While all three coevolution, adaptive radiation and even mass extinction bring changes in the species in some or the other form with time.
Hence, option A is correct