In the following group discussion, which technique is Evgeny using to better evaluate an argument? EVGENY: Does this author even have the authority to comment knowledgably on the topic? HAILIE: Well, he is a doctor so it seems that, obviously, he knows what he's talking about. EVGENY: Right, but does he have children of his own? How can he suggest parents make this difficult medical decision if he doesn't know what it's like to have a sick child? A. Restating an idea to ensure understanding
B. Holding group members accountable
C. Challenging established ideas
D. Disagreeing respectfully