28.
(B).
The conclusion of the argument is contained in the last sentence:
“Thus, the methods that the prospector had used to determine the size of the
oil deposit must have been inaccurate.” The evidence provided is that the
prospector reported a large oil deposit that was later determined to be much
smaller. The unstated assumption necessary for the conclusion is that there is
not another reason why the prospector might have reported a larger oil deposit
than actually existed.
(A) It is not necessary to the conclusion that a third party affirmed the
company’s determination because the conclusion accepts that the oil deposit
was indeed smaller than indicated by the prospector and focuses on the cause
of the discrepancy as opposed to the discrepancy itself.
(B) CORRECT.
The argument concludes that the prospector’s methods
resulted in inaccurate measurements of the size of the oil deposit. This
assumes that the prospector did not simply misreport or misrepresent the
measurements, presumably for personal gain.
(C) The commercial feasibility or profitability of the oil deposit is not integral
to the argument or its conclusion.
(D) Whether the prospector utilized the same methods to measure the oil
deposits in other locations is not relevant to the argument or the conclusion.
(E) That the company has a long operating history and much experience
drilling oil wells is not relevant because the company’s measurements of the
size of the oil field are accepted as a given.
29.
(C).
This passage relates information from two studies concerning high
school seniors: the first discusses the financial responsibilities of high school
seniors, while the second explains the coursework in finance taken by typical
high school seniors. On the GRE, a proper response to a Draw a Conclusion
question must directly follow from the evidence in the passage.
(A) Although it might be true that schools would be wise to educate students
in finance, this is an opinion that does not have to be true based upon the
given evidence.
(B) That one-third of high school seniors claim “significant financial
responsibilities” to their families does not necessarily mean that these same
students work “part-time jobs after school.” There are many ways that these
students might earn money for their families. If they do work, they might
work on weekends or over the summer.
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