SAT English Practice Question

In the excerpt, the author describes the way that "the human species has evolved to be especially good at noticing things that are different or unusual." For example, the author mentions that we are more likely to notice a single red flower in a field of yellow flowers than we are to notice a single yellow flower in a field of yellow flowers. The author uses this example to illustrate that

1. A.people often fail to notice subtle differences.
2. B.people are more likely to notice things that stand out.
3. C.people are often misled by appearances.
4. D.people have difficulty noticing things that are the same.