《普速铁路桥隧建筑物修理规则》规定，桥隧建筑物灌注桩基础，浇筑水下混凝土前应清底，摩擦桩桩底沉渣允许厚度不应大于（)。

A.1%

B.2%

C.3%

D.5%

A.±20mm

B.±30mm

C.±40mm

D.±50mm

A.2mm

B.3mm

C.4mm

D.5mm

A.10mm

B.20mm

C.30mm

D.40mm

A.≤100mm

B.≤150mm

C.≤200mm

D.≤300mm

A.1mm

B.2mm

C.3mm

D.4mm

A.5mm

B.10mm

C.15mm

D.20mm

A.1/700

B.1/800

C.1/900

D.1/1000

A.5

B.10

C.20

D.30