Answer: B. The wounded men are suffering further because of a lack of food.
Explanation:
Hancock, who is the speaker in this passage, notes that some days they will have nothing to cook with such that they have to feed their men with dry bread and poor coffee instead of proper food.
These men were already wounded and so were already suffering. A lack of food will make them suffer even more. This is why Hancock notes that some will curse and some will pray because that is how they will react to the further suffering.