Data Interpretation Big Book Test 10 Section 3 Q 25

The answer is A but shouldnt II be correct as well as it is given in the graph. Please help me

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The key to look here is the word “each”.

Here, we only have the aggregated data for all the US Manufacturers. So, individually, some may give extremely good returns, and some may give low returns. On the other hand, option B indicates “each” manufacturer in the US.