A pump station serving a small subdivision will lift water from a clear well of varying water surface elevation. The pump will start at elevation $120ft$

and shut off at elevation $100ft.$ The elevation of the pump centerline is $90ft,$ and the elevation of the discharge reservoir is maintained at a constant

$160ft.$ The equivalent length of the discharge pipe is $2000ft$ of $12in$ diameter pipe, and the equivalent length of the suction pipe is $1500ft$ of $16in$

diameter pipe. Suction and discharge pipes are ductile iron. The pump performance data are given in the table.

The pump capacity range for the given conditions will be most nearly

A$.600-1250gpm$

B$.1100-1850gpm$

C$.1350-1700gpm$

D$.1650-2000gpm$