参考答案

正确答案：C
解析：What did Henri Dunant dO during the battle between the French and Austrian armies?
本题的选项大多与战争中的医疗服务有关。可以推断本题的问题可能与医疗服务有关系。文中提到“Shocked by the lack of medical supplies and the attention given to the wounded, Dunant decided volunteer services had to be organized.”Dunant震惊于战争中医疗物资缺乏和伤员缺乏照顾的情况，因此决定组织志愿者服务。故正确答案为C)。