Advertisement: At most jewelry stores, the person assessing the diamond is the person selling it, so you can see why an assessor might say that a diamond is of higher quality than it really is. But because all diamonds sold at Gem World are certified in writing, you' re assured of a fair price when purchasing a diamond from Gem World. The reasoning in the advertisement would be most strengthened if which one of the following were true?
A: The diamonds sold at Gem World are generally of higher quality than those sold at other jewelry stores.
B: The certifications of diamonds at Gem World are written by people with years of experience in appraising gems.
C: The diamond market is so volatile that prices of the most expensive diamonds can change by hundreds of dollars from one day to the next.
D: The written certifications of diamonds at Gem World are provided by an independent company of gem specialists.
Choose A, B, C or D as your solution.
D