Some weed species have developed the ability to resist pesticides. How does the Theory of Evolution by natural selection help to explain this ability?
A. In any population of weeds, some weeds will be naturally immune to all kinds of pesticides.
B. The weeds developed pesticide-resistant variations because their survival depended on it.
C. Due to genetic variations, some weeds in the population had the ability to resist pesticides.
D. As the weeds evolved, natural selection resulted in an unfavorable variation in a population.