SajjadAhmad
Source: McGraw hill GMAT: 2013
In theory, Ecuador could be a major exporter of shrimp. In actuality, it is not. The explanation is that 80 percent of the country’s rich estuaries are owned by the government. This hurts Ecuador’s shrimp production, because the government does not have the flexibility necessary for efficient shrimp farming that private industry possesses
The answer to which of the following questions would be most relevant to evaluating the adequacy of the explanation given above?
A. Who owns the 20 percent of estuaries that are not owned by the government?
B. What percentage of Ecuador’s production of shrimp is consumed domestically?
C. Has the government stated any plans to sell any of its estuaries to private industry, provided that the price is sufficient?
D. Is Peru, Ecuador’s neighbor to the south, actually better suited for commercial shrimp farming than Ecuador, which is a substantially smaller country?
E. How does Ecuador’s shrimp production on government-owned estuaries compare to that on comparable land owned by private industry?
Dear
SajjadAhmad,
I'm happy to help.

This is a great CR practice question.
This question stem, "
evaluating the adequacy of the explanation," is similar to
evaluating the argument.
A. Who owns the 20 percent of estuaries that are not owned by the government? Not helpful. Even if this 20% is devoted to maximum shrimp production, this is only a small part of what would be available. Furthermore, even if we know Company A vs. Company B owns these estuaries, how would we know which one would get more shrimp out of the situation.
B. What percentage of Ecuador’s production of shrimp is consumed domestically?This changes the focus. The explanation is all about the production side. If Ecuador is producing a lot but consuming a lot, that's different problem. This is intriguing, but it would concern a different argument, not this one.
C. Has the government stated any plans to sell any of its estuaries to private industry, provided that the price is sufficient?This would concern the future, perhaps the near future, but this argument is centered in the past & present.
D. Is Peru, Ecuador’s neighbor to the south, actually better suited for commercial shrimp farming than Ecuador, which is a substantially smaller country?Suggestive, by analogy, but this is seldom the most persuasive kind of argument.
E. How does Ecuador’s shrimp production on government-owned estuaries compare to that on comparable land owned by private industry?Bingo! The crux of the argument is that Ecuador does not produce much shrimp because the government owns most of the estuaries. Well, what happens on those estuaries owned by the government? How does the lack of "
flexibility" really impact them? Is the shrimp production on government land really substantially less than on private land? The argument absolutely depends on this point.
OA =
(E)Does all this make sense?
Mike