单选题 The immigrants' flushing in was considered a threat to American value mainly because

A、 the immigrants came from poverty-stricken nations of southern and eastern Europe.
B、 the immigrants had been accustomed to poverty and dependence.
C、 the immigrants had different homeland traditions and other particular characteristics.
D、 the immigrants did not speak English.

【正确答案】 C

【答案解析】[解析] 本题考查事实细节。为什么大量移民的涌入被认为是对美国价值观的威胁?从文章的第一段最后—句中可以找到答案：由于大量移民有着不同的特征和传统，所以他们被视为是对美国价值观的威胁。通读各选项，[A]、[B]、[D]均可被排除。