Tanco, a leather manufacturer, uses large quantities of common salt to preserve animal hides. New environmental regulations have significantly increased the cost of disposing of salt water that results from this use, and, in consequence, Tanco is considering a plan to use potassium chloride in place of common salt. Research has shown that Tanco could reprocess the by-product of potassium chloride use to yield a crop fertilizer, leaving a relatively small volume of waste for disposal.
In determining the impact on company profits of using potassium chloride in place of common salt, it would be important for Tanco to research all of the following EXCEPT:
Tanco, a leather manufacturer, uses large quantities of common salt to preserve animal hides. New environmental regulations have significantly increased the cost of disposing of salt water that results from this use, and, in consequence, Tanco is considering a plan to use potassium chloride in place of common salt. Research has shown that Tanco could reprocess the by-product of potassium chloride use to yield a crop fertilizer, leaving a relatively small volume of waste for disposal.
In determining the impact on company profits of using potassium chloride in place of common salt, it would be important for Tanco to research all of the following EXCEPT:
A. What difference, if any, is there between the cost of the common salt needed to preserve a given quantity of animal hides and the cost of the potassium chloride needed to preserve the same quantity of hides?
B. To what extent is the equipment involved in preserving animal hides using common salt suitable for preserving animal hides using potassium chloride?
C. What environmental regulations, if any, constrain the disposal of the waste generated in reprocessing the by-product of potassium chloride?
D. How closely does leather that results when common salt is used to preserve hides resemble that which results when potassium chloride is used?
E. Are the chemical properties that make potassium chloride an effective means for preserving animal hides the same as those that make common salt an effective means for doing so?
如果把C改成:What environmental regulations, if any, could potentially penalize the disposal of the waste generated in reprocessing the by-product of pottasium chloride那还稍微可行。
答案最好是C,虽然我知道E是正确答案,且E也确实不完美。
E的问题不在于Out of Scope。如果硬要说E是不行的,那也在于Unecessary Assumptions。E的不完美之处在于“Same”,就是这个化学成分在两个目标物质里是不是一样的。这个其实不需要一样,只需要effective就行,如果不effective,必然会影响profit和cost。诚然,即便effective也可以是不同的化学成分。
D选项讨论的是产品的质量问题,E选项说的是,在同等情况下(potassium chloride 和 salt 都是effective means ),达到相同目的时,生产过程中起作用的chemical properties是否相同。 profits由收入和成本决定,chemical properties与收入、成本无关。。。
u r right, the subject is chemical properties, and i thought it was the 'effective means' ( i need to pay more attention while reading) thx for pointing that out for me