【正确答案】 B

【答案解析】[听力原文] 18-21
For every man in the Civil War who died in battle, two or three men died of disease. Doctors of that time knew very little about causes of sickness or ways of preventing it. Thousands of men in poor health became soldiers. Hundreds of others had never had childhood disease. Many of these soldiers could not withstand the epidemics that went through the camps.
Army life was hard; soldiers got few fruits or vegetables. There was no milk unless they happened to find a cow. Neither their clothes nor their shelters protected the traps from rain, snow and cold, sickness and disease were spread by insects, rats and impure drinking water. Often the man drank straight from muddy streams.
Gunshot wounds were serious, as in any war, but they did not cause as much death and suffering as disease did.

由第一句“Two or three men died of disease”。