Earlier, any trade relation between the ancient kingdoms of Sphylgor and Gorphyl was ruled out because of the inhospitable desert between them. The desert would have made it impossible for them to regularly travel such long distances at a time when the Syphlgorians were not aware of the use of the wheel. However, the discovery of large numbers of Sphylgorian coins in Gorphyl has prompted archeologists to conclude otherwise.
Which of the following, if true, weakens the archaeologists' conclusion?
A. Sphylgorian and Gorphylians coins were so similar in appearance that it would take an expert archeologist to differentiate between the two.
B. Sometimes the local Gorphylians engaged in the barter system and as such exchanged goods among themselves for commercial purposes.
C. It has been asserted that the Syphylgorians were part of a very secretive society and would not have easily given out any of their trade secrets.
D. At the time of solemnizing marriages, royal families of different kingdoms would exchange local artifacts, garments, currency etc. in remarkable quantities.
E. No precedence exists in history where there were amiable relations between two kingdoms that did not engage in any trade relations.