Which one of the following sequences is the most suitable for treating raw durface water to make it suitable for drinking purpose?

A

Screening $$\rightarrow$$ filtration $$\rightarrow$$ sedimentation $$\rightarrow$$ disinfection

B

Screening $$\rightarrow$$ disinfection $$\rightarrow$$ sedimentation $$\rightarrow$$ filtration

C

Screening $$\rightarrow$$ sedimentation $$\rightarrow$$ disinfection $$\rightarrow$$ filtration

D

Screening $$\rightarrow$$ sedimentation $$\rightarrow$$ filtration $$\rightarrow$$ disinfection