Effective participation in group discussions requires an exchange of ideas, constructive debate, and

an argument
a timekeeper
some courtesy
an agenda

What effect is achieved by the author telling us that burr set out to "seduce" nolan? a) it causes the reader to see burr in a sinister light. b) it puts a positive spin on burr's actions and character. c) it creates in the reader a sense that nolan will be changed for the better. d) it makes burr seem slightly less heroic, despite his general valorous qualities.