If organisms A, B, and C belong to the same class but to different orders and if organisms D, E, and F belong to the same order but to different

If organisms A, B, and C belong to the same class but to different orders and if organisms D, E, and F belong to the same order but to different families, which of the following pairs of organisms would be expected to show the greatest degree of structural homology?*Select at least 1 response and no more than 1 response.