种植屋面规范JGJ155-2013中，缓冲带一般由（）构成。

A.300g/m²
B.250g/m²
C.200g/m²
D.150g/m²

A.150mm；100mm
B.100mm；150mm
C.150mm；150mm
D.100mm；100mm

A.150mm
B.100mm
C.200mm
D.125mm