Прочитайте текст.
In Western cultures, people look each other in the eye during a conversation to show interest and trust, but in many Asian countries, it’s rude to look people in the eye, especially a superior such as a teacher. One of the most basic and powerful signals is when a person crosses his or her arms across the chest. This can indicate that a person is putting up an unconscious barrier between themselves and others.
Закончите предложение:
One of the most basic and powerful signals is …
when people shake hands
when a person look at his or her arms
when people look each other in the eye
when a person crosses his or her arms across the chest