下面哪一个选项最好的描述了特性样本以及变量样本？（ ）A．特性样本与预防有关，而变更样本与监督有关B．特性样本与一致性有关，而变量样本与一致性的程度有关C．特性样本与具体原因有关，而变量样本与任何原因有关D．两者是同一概念
下面哪一个选项最好的描述了特性样本以及变量样本？（ ）
A．特性样本与预防有关，而变更样本与监督有关
B．特性样本与一致性有关，而变量样本与一致性的程度有关
C．特性样本与具体原因有关，而变量样本与任何原因有关
D．两者是同一概念
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