My most famous relative of all, ____ who really left his mark on America, was Rob Sussel, my great-grandfather.

A．the one

B．one

C．he

D．someone

下列离子方程式正确的是（　　）

A．碳酸的电离     H₂CO₃⇌H⁺+HCO₃^-

B．将金属钠加入水中      Na+2H₂O=Na⁺+2OH^-+H₂↑

C．硫化钠水解            S^2-+2H₂O=H₂S↑+2OH^-

D．向氯化铝溶液中加入过量的烧碱溶液   Al³⁺+3OH^-=Al（OH ）₃↓