Why are violins made by Stradivarius in the early 1700s far superior to most other violins? Some experts suggest secret varnishes, but there is no evidence for this. However, climatologists have found that in the 1600s and early 1700s weather patterns in the region of Italy where Stradivarius worked affected tree growth to produce wood with special acoustic properties. Ttherefore, it is likely that__. Which one of the following most logically completes the argument? ['Stradivarius was the only violin maker in the early 1700s to use the wood produced in that part of Italy', 'no violin made from present-day materials could rival a Stradivarius violin for sound quality', 'the special qualities of Stradivarius violins are due in part to the wood used to make them', 'some other Italian violin makers in the early 1700s produced violins that equaled the quality of Stradivarius violins']