Which is NOT a correct statement about the national income accounts? Part 2 A. The alternative approaches to measuring economic activity are useful because each approach gives a different perspective on the economy. B. The product approach to measuring economic activity is calculated as the sum of the value added by producers. C. There are three approaches to measuring current economic activity: the product approach, the income approach, and the expenditure approach. In principle, the three approaches give the same answer. D. The income approach to measuring economic activity provides a figure that is equal to the sum of revenues by the producers of output, which in turn is equivalent to that of the product approach