Problem: Thomas langurs continue to make danger calls until all of the members of their group respond with a countercall. Which of these two accounts of Thomas langurs' calling behavior fit Morgan's Canon (from the Introduction Lecture)? Question options: A. When other members countercall, they too believe there is a leopard nearby. B. The "... male has formed an association between the behaviour of another group member and whether the other group member gave alarm calls or not. If group members that did not give alarm calls behaved in such a way that they are more prone to get caught by a predator it is beneficial for the male to keep on calling, until all group members have called." (That is, non-calling monkeys are associated with being attacked) C. Neither of these choices is consistent with Morgan's Canon. D. Both of these choices is consistent with Morgan's Canon.