Brassica oleracea was a European wild plant. Early farmers were able to use artificial selection on this plant to produce cabbage, Brussels sprouts, kohlrabi, kale, broccoli, and cauliflower. This diversification through selection was 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. artificial selection is only done on plants that are used for food, whereas natural selection is used on all other plants.
Answer: C. artificial selection does not require differential reproductive success, whereas natural selection does.
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