Beautiful faces are often just the result of averaging. Scientific research has found that the more people's faces are combined together with a computer, the more attractive the new faces are. The two faces are only ordinary people, and 32 faces can be synthesized. This is because the average face masks the original disharmony, or because the average face is very symmetrical, and symmetry is one of the signs of health. Regarding this text, the following understanding is accurate (>). ['Ordinary people become ordinary people because their faces are common.', 'Individual faces often appear less beautiful due to non-averaging.', 'Faces may be attractive because of coordination or health.', 'Beauty is a subjective feeling, not everyone likes computer-synthesized faces.']