Cages. Plus note the color of the yolk. A free range organic egg has a thick deep yellow, almost orange yolk. Factory egg yolks and whites are thin and watery and pale yellow and tasteless.
I also try to get free range eggs but even then that may or may not actually mean they are what I call "yard eggs" but simply eggs where the hens are not in cages but still in small enclosures. When I lived in TN I would get my eggs from my neighbors (everyone but us it seems had chickens) who always let their chickens run free. (I had one neighbor who's chickens actually roosted in the trees around his house.