Augustus's attitude toward the clerk throughout the play can best be described as C. Condescending and irritated.
Throughout the dialogue, Augustus expresses his frustration and disappointment multiple times, perceiving the clerk's responses as foolish or imbecilic ("I did not know that I was talking to an imbecile"). Augustus's irritation is evident in his rising anger, his accusations of the clerk's lack of patriotism, and his overall condescending view toward the clerk's understanding of the wartime situation. The clerk, meanwhile, challenges Augustus’s assumptions and highlights the contradictions of war, which further irritates Augustus. Thus, the dynamic fits the condescending and irritated characterization rather than any respectful or friendly interaction.