In this passage, we are looking for the phrase that does not imply Darcy's insulting attitude toward Elizabeth. Let's analyze the options:
A. "I thank you for explaining it [your opinion] so fully" (lines 2-3): This phrase seems polite and does not necessarily imply insult.
B. "had I...concealed my struggles, and flattered you into the belief of my being impelled by unqualified, unalloyed inclination" (lines 7-9): This statement implies a sense of insincerity and manipulation which can be seen as insulting.
C. "my honest confession of the scruples that had long prevented me from forming any serious design" (lines 6-7): This phrase suggests honesty and openness, not necessarily insult.
D. "had not your pride been hurt by my honest confession" (lines 5-6): This statement implies that Elizabeth's pride was hurt by Darcy's honesty, indicating a negative impact on Elizabeth, which can be seen as insulting.
E. "Could you expect me.... to congratulate myself on the hope of relations, whose condition in life is so decidedly beneath my own?" (lines 11-13): This phrase clearly conveys a sense of superiority and condescension towards Elizabeth, indicating an insulting attitude.
Therefore, the phrase that does not imply Darcy's insulting attitude toward Elizabeth is option C: "my honest confession of the scruples that had long prevented me from forming any serious design" (lines 6-7).
