Since 1941 L.A. has drawn water from mountain streams that feed into Mono Lake.
If water continues to be drawn from the streams at the present rate, in about 30 years the resulting drop in water Level of Mono Lake will trigger a chain reaction ending in the destruction of the ecosystem of the lake.
Which of the following is an assumption on which the prediction is based?
a) Since 1941 the ecosystem of Mono Lake has changed significantly as a result of a drop in the lakeâ€™s water level.
b) The amount of water that evaporates from Mono Lake has increased annually since at least 1941.
c) L.A. is investigating the availability of a different source of water that could supplement the water it draws from the mountain streams.
d) Voluntary water conservation will not by itself be sufficient to hold L.A. water needs to present levels.
e) Any water flowing into Mono Lake from sources other than the mountain streams will be insufficient to prevent the triggering event from occurring.
The O.A. is (e)? Any thoughts.Rgds,
We can crack the exam together