Unlike the wholesale price of uncut diamonds, the wholesale price of other uncut gemstones has fallen considerably in the last year. Thus, although the retail price of jewelry made with gemstones other than diamonds has not yet fallen, it will inevitably fall.
Which of the following, if true, most seriously weakens the argument above?
A. The cost of processing uncut gemstones has increased during the last year.
B. The wholesale price of uncut diamonds is typically higher than that of the same volume of other uncut gemstones.
C. The operating costs of the average retail jewelry store have remained constant during the last year.
D. The cost of mining gemstones other than diamonds has increased in the last year.
E. Changes in retail prices always lag behind changes in wholesale prices.
Stimulus: The whole sale price of uncut diamonds has increased but that of other gem stones has decreased. The retail jewellery market for gem stones has not fallen but will eventually fall.
weakening: Find a reason that the retail gemstone market will not fall.
Option B and E are strengthening the stimulus instead of weakening hence can be eliminated.
C: the operating cost of the has remained constant. Can be eliminated
In between A and D. IMO D as the mining cost of gemstone increases the overall cost of the retail jewelry will also increase.
The cost of mining other