The story is about "George Orwell's". He want to express his military life, when first time he got rifle in his hand. They were marching, and he was thinking like a normal guy as he just joined the Military, that what if... he does this or this? This expresses the fear, excitement, respect in his heart for his profession, and he loves it.
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Using a natural voice is important than using an ideal voice. The passage tells us that many people that have the prestige of having a low voice, try to alter their voice, which can cause voice damage. While Choice C is correct, it is not the main idea, while Choice A would be.
In both "Ambush" and "Facing it" the death of a soldier is discussed.
Her mother was working at the restaurant before you came here.