Chembeti wrote:
A study conducted last year has indicated that striped bass in the Hudson River have more tumors than striped bass in rivers without industrial or agricultural development along their banks. In the previous two decades, significant progress had been made in clearing the Hudson of industrial pollution thought to promote tumorous growth, yet tumor levels in Hudson River striped bass are virtually unchanged from before this reduction.
Which of the following, if true, best helps to explain the situation explained above?
fact 1 : striped bass in hudson river have more tumors than striped bass in other rivers w/o argi dev.
fact 2 : significant progress have been made in cleaning the hudson river yet tumor levels are virtually unchanged.
it was supposed that industrial pollution caused tumor but that was not the case. Thus possible answer could be that something else might be causing tumor rather than industrial pollution or pollutant are not removed during cleaning. Lets check options to find the answer
A. There is a causal link between pollution from industrial and agricultural sources and the tumors on striped bass.
if this is the case then tumors should have reduced on cleaning hudson riverB. A change in the levels of industrial pollution has had little effect on most species of fish in the Hudson.
what if striped bass does not belong in fishes counted under most speices. Could be a probable contender if we coudl not find a better option C. Efforts to clear the Hudson of industrial pollution have not removed all such pollution.
even if they have 'nt removed all the pollutant then also there should be slight decrease in tumor cases number, which remained unchangedD. No other fish but striped bass are susceptible to the effects of industrial pollution.
if this was true then tumors cases in striped brass shoudl have dropped on cleaning Hudson riverE. The level of actual tumor-promoting agricultural pollution in the Hudson has remained relatively steady in the last 30 years.
this explain that despite the cleaning of river tumor causing pollutants are still existant. IMO correct answer