T61 All of us communicate with one another nonverbally ( x1 i8 se), as well as withwords. Most of the time we're not aware of it. We gesture with eyebrows or a hand, meetsomeone else's eyes and look away, change positions in a chair. In recent years researchers havediscovered that there is a system to them almost as consisten and understandable as language.One important kind of body language isGye behavior. Americans are careful about how andwhen they meet one another's eyes. In our normal conversation, each eye contact lasts only abouta second. When two Americans look searchingly into cach other's eyes, they become moreintimate Therefore, we carefully avojd this. except in suitable situation. Researchers who are engaged in the study are not prepared to spell out a precise vocabularyof gestures. When an American rubs his nose, it may mean he is disagreeing with someone orrefusing something. But there are other possible interpretations ( 4#), too. Another example :when a student in conversation with a professor holds the older man's eyes a ittle longer than isusual, it can be a sign of respect; it can be a challenge to the professor's authority ( hxl); itcan be something else entirely. The researchers look for patterns in the situation, not for aseparate meaningful gesture. Communication between human beings would be just dull if it were all done with words.What do researchers thinkbody language?
选项：

A: Body language can be understood and used by peaple in communication
B: Body language ts more important than spoken language in communication.
C: Body language has been discovered in recent years.
D: Body language is the study of communication through body movement.