某高填土路基，填土高度5.0m，上部等效附加荷载按30kPa考虑，无水平附加荷载，采用满铺水平复合土工织物按1m厚度等间距分层加固，已知填土重度γ＝18kN/m3，侧压力系数Ka＝0.6，不考虑土工布自重，地下水位在填土以下，综合强度折减系数3.0。按《土工合成材料应用技术规范》（GB/T 50290—2014）选用的土工织物极限抗拉强度及铺设合理组合方式最接近下列哪个选项？（ ）[2017年真题]（单选题）
A. 上面2m单层80kN/m，下面3m双层80kN/m
B. 上面3m单层100kN/m，下面2m双层100kN/m
C. 上面2m单层120kN/m，下面3m双层120kN/m
D. 上面3m单层120kN/m，下面2m双层120kN/m
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