IGOR: Tell me if I've got this right: Your point is that vegetarianism is good for humanity's longevity because the bulk of the grain crops in the world are grown to feed livestock? FATIMA: Yep, that's right. Which option best describes what Igor is doing in this discussion? A. Assessing a partner's claims
B. Asking a clarifying question
C. Challenging established ideas
D. Supporting a claim with evidence​