What do the measures of variation tell us about the prices of a Big Mac in different countries? A. The range alone tells us that there are very substantial differences among prices of Big Mac hamburgers in different countries. B. The variance and standard deviation tell us that Big Macs have higher prices in wealthier countries. C. The variance and standard deviation tell us that Big Macs have lower prices in wealthier countries. D. The range alone tells us that there are very small differences among prices of Big Mac hamburgers in different countries