Assume report1 and report3 are both correct, which of the following can be a reason for seemingly divergent ranks of different companies and their products?
Explanation:
Report 1 is focused on the US, while option 2 focuses on Japan, eliminating it. Options 3 and 4 bypass the crux of the question. Option 1 creates the possibility that the sales of iPhone could have come from iPhone 4 (note that report 1 discusses the sales of the iPhone in general and report 3 discusses iPhone 5 in particular). Hence, the correct answer is option 1.
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