The key element of are coming to an agreement that most members if your group are okay with and coming away with a feeling that everyone has been heard. A. active participation B. informal consensus C. informal conversation D. Initial presentation

The answer to the blank is “informal consensus”

Explanation:

a.Active participation: This type of participation refers to the participation of an individual, or even a group of people, in a discussion or activity where by they show their caliber, aptitude and interest in the discussion. It may not always  involve a group.  

b.Informal consensus: This is where like minded individuals having  similar interest and expertise in their arena, come together to discuss ideas and informally agree upon certain rules or norms to be followed for the presented idea or issue.

There will be no signed pact or agreement, yet the agreed rule would be made to be followed hence forth.

c.Informal conversation: This is more of a conversation between specifically two individuals who are having a talk on mundane topics with no specific aim of an outcome after the conversation.

d.Initial presentation: This is more of one individual doing a presentation in front a group of people, where the audience just hear to the speaker and the speaker presents his ideas or opinion on the topic.

"a" because he is appealing to logic as oppose to appealing to the audience's emotions.