Colorless diamonds can command high prices as gemstones. A type of less valuable diamonds can be treated to remove all color. Only sophisticated tests can distinguish such treated diamonds from naturally colorless ones. However, only 2 percent of diamonds mined are of the colored type that can be successfully treated, and many of those are of insufficient quality to make the treatment worthwhile. Surely, therefore, the vast majority of colorless diamonds sold by jewelers are naturally colorless. A serious flaw in the reasoning of the argument is that

Colorless diamonds can command high prices as gemstones. A type of less valuable diamonds can be treated to remove all color. Only sophisticated tests can distinguish such treated diamonds from naturally colorless ones. However, only 2 percent of diamonds mined are of the colored type that can be successfully treated, and many of those are of insufficient quality to make the treatment worthwhile. Surely, therefore, the vast majority of colorless diamonds sold by jewelers are naturally colorless.

A serious flaw in the reasoning of the argument is that

A、
A. comparisons between the price diamonds command as gemstones and their value for other uses are omitted
B、
B. information about the rarity of treated diamonds is not combined with information about the rarity of naturally colorless, gemstone diamonds
C、
C. the possibility that colored diamonds might be used as gemstones, even without having been treated, is ignored
D、
D. the currently available method for making colorless diamonds from colored ones is treated as though it were the only possible method for doing so
E、
E. the difficulty that a customer of a jeweler would have in distinguishing a naturally colorless diamond from a treated one is not taken into account

专业教师答疑

问题：请唐老师解答，谢谢。我只读了surely之后意思是珠宝商卖的大部分无色钻石是自然无色的，然后看选项觉得都无关查看答疑

扫我提问哦！