C B A D. C sorts to the top of the class with her overall advantage in dairy character, straightness of lines and correctness of mammary system. C uses her advantage of dairyness, being sharper over the shoulder, more open in the rib, cleaner from hooks to pins, and more incurving in the thigh to place over B. C also is higher, wider, and fuller right at the top of the rear udder than B. I do recognize B for her width and strength through the front end, especially when viewed from the rear.
In a close middle placing, B goes over A. B has an advantage in the mammary system, being wider in the rear udder, showing more definition of seam. I prefer the way her teats are placed when compared to A. B also stands more squarely on her hind legs when viewed from the rear, and I prefer the set to the leg and strength of pastern on B over A. I do grant A for being a little longer cow from end to end than B.
In a logical bottom pair, A uses her advantage in mammary system, straightness of topline, levelness from hooks to pins, and neatness about the tail setting over D. I prefer A especially in the balance of fore to rear quarters and height of rear udder attachment over D. Admiring D for her extreme dairyness, she just lacks the overall blending of parts and strength of udder attachments to place any higher.