-This Figure Shows the Chloride Concentration in Baltimore -Area Streams

Multiple Choice

-This figure shows the chloride concentration in Baltimore -area streams. Which of the following conclusions can be drawn from the data shown?

A) Urban areas are more impervious than rural areas.
B) Chloride levels in suburban streams are safe for land plants.
C) Streams in rural areas are contaminated with nitrates and phosphates from the overuse of fertilizers.
D) Urban streams are contaminated mainly with chloride flowing in from suburban areas.
E) Land plants contribute considerable amounts of chloride to urban streams.