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If the theme that war is brutal and terrible is developed through Henry's mother, we can consider that it shows a negative reaction towards the war. She may be showing fear, insecurity, anger and even revolt, showing that there is something, related to war that deeply bothers her, because she understands the danger, pain and destruction that war promotes. In that case, to answer that question, you must find this reaction that Henry's mother demonstrates and explain the element that causes it.
The Germany point of view in the novel provides a better insight into the understanding of Nazi Occupied Germany. It provides you a better understanding on how the Nazis affected the citizens living in Germany and wjat changes were brought upon and after their arrival.
Probably B. Regret, correct me if I am wrong
Brian awakens suddenly, feeling unbelievable thirsty. It's mid-afternoon now, and his face is badly sunburned. He wonders whether the lake water is safe to drink, and he thinks briefly of the dead pilot.