In the sentence "We must help the victims in the earthquake out of trouble ", the underlined part is an additional explanation of
【正确答案】 C
【答案解析】解析：补语用法题。out of trouble在句中充当补语，是对宾语the victims的补充说明。补语具有鲜明的定语性说明或限制性功能，在句法上是不可或缺的。故答案为C。