Which of the following words is a root? ( )

Which of the following words is a root? ( )
A、International.
B、Nation.
C、National.
D、Internationalists.
【正确答案】:B
【题目解析】:词根的辨析词根是指自己可以独立存在的不能再分割的最小语义单位,只有nation符合不可分割的条件。