The correct answer is letter B
In this case, the extremes are favored. As an example, we can mention the species Passerina amoena, which has individuals with a bright bluish color, individuals with a brownish color and other intermediaries. In that case, the blues are better at getting territories and breeding. The brown ones are ignored by the bluish ones and are also able to reproduce. Those of intermediate color, on the other hand, are noticed by the other males and are not so specialized to achieve territories, reproducing less.