Bakewell's selective breeding experiments showed how distinct species could be created by allowing only chosen pairs of animals to mate. Based on this information, how was selective breeding MOST likely attempted in the previous centuries?
A. by renting out or loaning ""studs"" to mate with many females
B. by keeping many males and females with desired traits together
C. by taking much better care of the offspring with desired traits
D. by culling all the male ""studs"" that proved to be too aggressive.