Cancer in North America (CINA) includes data on more than ______ million cancer cases.

• A. 2
• B. 6
• C. 4
• D. 8

Answer: (B)

The data from Cancer in North America track the overall burden of cancer across the three large countries in the region, not just yearly new cases. Because it sums up diagnoses over time and across a substantial population, the total number of people who have been diagnosed with cancer in that region reaches into the millions. Six million is used to reflect this sizable burden, making it the best fit among the options. The smaller totals would understate the regional impact, while the larger total would overstate it relative to how this dataset is commonly summarized.