In the following conversation, which group discussion techniques does emily most clearly show? o. k., well, i didn't understand the main theme of the article. at first i thought the author was trying to explain that our food was safe, since the fda found no evidence of major radiation contamination. but then it seemed like the author was discussing ways to prevent the incident from happening again. so what was the overall theme? a: asking clarifying question b: challenging established ideas c: using evidence to support your conclusions d: assessing the claims of your discussion partner