问题：
[单选题]According to the teacher, it would be better if the participants in the group discussion ______.
Aaddressed each other by their names
Bsaid hello to each other
Cintroduced their hometown
Dhad more eye contact
[单选题]According to the teacher, it would be better if the participants in the group discussion ______.
Aaddressed each other by their names
Bsaid hello to each other
Cintroduced their hometown
Dhad more eye contact
