Bunuel
At HappyDay farms, seasonal staff is employed to pick apples during the harvest season each year. This staff is trained to identify and select only high quality apples, table-worthy apples. As part of this process, apples that have been visibly damaged by insects or disease are left to rot in the fields. The farmer who owns the property and sells the fruit is, therefore, less well informed about potential problems with his crops, such as insect infestations, than are the pickers themselves.The conclusion drawn above is based on the assumption that(A) the pickers are more qualified to assess the quality of the fruit sold by the farmer than is the farmer.(B) during a complete year, the farmer spends more time in the field than any single seasonal picker.(C) quality control is more important for members of the highest group in a hierarchy than members of the lowest group to ensure.(D) the farmer obtains all of his information about problems with fruit quality from no source other than the pickers.(E) the farmer, concerned with maximizing profits from sales, would want fewer apples left to rot in the field.
Official Explanation
To find the assumption that forms the basis of this scenario, first, identify the conclusion: the farmer is not as well-informed about potential problems with his fruit as his pickers are. The evidence we have is that the pickers see and pick the substandard fruit. The only scenario in which this makes sense is if the pickers are the farmer’s only source of information (D)--he’s not looking at it himself, not being informed about it by a foreman, or otherwise finding out independently.
In the case of both (A), note that the stimulus itself isn’t making an argument about what “should” happen, only about what does happen. Who would be most qualified to assess the quality is not relevant to this particular conclusion.
Choice (B) is a weakener. If the farmer spend more time in the field, then he likely would be more informed about the potential problems with the crops. This weakens the conclusion, whereas an assumption would strengthen it.
Similarly, (C) makes a claim that the passage does not support. The passage tells us that the farm has this policy, not that the policy is right or wrong. In this case, the farmer would be at the top of the hierarchy, but this isn’t relevant to the question itself.
Finally, what the farmer would want to happen is not relevant to what actually is happening already. Choice (E) is another answer exploring a "should" scenario that is not relevant to this argument.
Answer = (D)