27. Brassica oleracea was a European wild plant. Early farmers were able to use artificial selection on this plant toproduce cabbage, Brussels sprouts, kohlrabi, kale, broccoli, and cauliflower. This diversification through selectionwas possible because:A) artificial selection is always possible, whereas natural selection requires much larger population sizes.B) the species contained large amounts of genetic variation.C) artificial selection does not require differential reproductive success, whereas natural selection does.D) exotic species are always more adaptable than the native species in an area.E) artificial selection is only done on plants that are used for food, whereas natural selection is used on all otherplants.

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