题目内容：
请根据短文内容，回答题。Faces，like fingerprints，are unique．Did you ever wonder how it is possible for US to recognize people? Even a skilled writer probably could not describe all the features that make one face different from another．Yet a very young child or even an animal。such as a pigeon can learn to recognize faces，we all take this ability for granted．
We also tell people apafl by how they behave．When we talk about someone’s personality，we mean the ways in which he or she acts，speaks，thinks and feels that make that individual different from others．
Like the human face．human personality is very complex．But describing someone’s personality in words is somewhat easier than describing his face．If you were asked to describe what is “a nice face” looked like．you probably would have a difficult time doing so．But if you were asked to describe a “nice person”．you might begin to think about someone who was kind，considerate，friendly，warm，and so forth．
There are many words to describe how a person thinks，feels，acts．Gordon Allport，an American psychologist，found nearly 18，000 English words characterizing differences in people’s behavior．And many of US use this information as a basis for describing，or typing，his personality．
Bookworms，conservatives，military types people are described with such terms．
People have always tried to “type” each other．Actors in early Greek drama wore masks to show the audience whether they played the villain’s(坏人)or the hero’s role．In fact the words “person” and “personality” come from the Latin persona，meaning “mask”．Today，most television and movie actors do not wear masks．But we can easily tell the good guy from the bad guy because the two types differ in appearances as well as in actions．
By using the example of fingerprints，the author tells us that________． A．people can learn to recognize faces
B．people have different personalities
C．people have difficulty in describing the features of fingerprints
D．people differ from each other in facial features
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