Ⅳ. Group interaction in virtual learning space or audio communications
A. Ⅰ and Ⅱ
B. Ⅱ and Ⅲ
C. Ⅰ,Ⅱ and Ⅲ
D. Ⅰ,Ⅱ,Ⅲ and Ⅳ
Answer:D
Ⅳ. Group interaction in virtual learning space or audio communications
A. Ⅰ and Ⅱ B. Ⅱ and Ⅲ C. Ⅰ,Ⅱ and Ⅲ D. Ⅰ,Ⅱ,Ⅲ and Ⅳ