Which of the following statements about kinesics is correct?

Which of the following statements about kinesics is correct?
 
  a. Kinesics refers to the system of extralinguistic noises that accompany spoken language.
  b. Kinesics research has demonstrated that gender signals communicated through posture are biologically basedrather than learned.
 c. Cross-cultural research indicates that the body language used when people are greeting each other is similar allover the world.
 d. All cultures have the same gestures for yes and no..
  e. Anthropologists paid more attention to nonverbal communication prior to the 1950s.