Answer:
A. Clear
Explanation:
A clear discussion goal make the members of discussion group understand the reason why they choose the Topics. When they understand this, it will be easier for them to study the topic and prepare themselves from the upcoming discussion. They could easily discard the relevant information and focusing their time on the information that relevant to the topic.
This will make their discussion become more efficient. Not setting a clear topic will increase the chance of them getting distracted and eventually talked about something that is not relevant.
