Answer:
C. Capt. Kudo did not think much about killing the two innocent civilians while in Afghanistan, but later he could not stop thinking about it.
Explanation:
Marine Captain TImothy Kudo is a war veteran that served three tours in Iraq (2009), Afghanistan (2010, 2011).
He was recounting the moral injuries soldiers face in the battlefield. He was talking about a particular experience in Afghanistan.
There were men on motorcycles coming from the hill towards him and his team. The marines were not sure if they were hostiles or civilians. They tried to warn them off by shooting smoke grenades to the sides but these men wouldn't stop and suddenly, there was a flash of light that seemed like guns and his men opened ire, killing the two men instantly,
When they went for a closer look, they discovered they were civilians with sticks in bundles and the light they saw was from their motorcycle.
Capt Kudo didn't think much of the killings because everyday in Afghanistan was a new war and he couldn't show doubt lest his men get doubts of their own and the mission falls apart.
He pushed the incident down in his subconscious, but later, he could not stop thinking about it.