Final answer:
The true statement regarding the Triad countries is closest to option B, which claims they account for approximately 75% of world income, although the actual figure is about 68.3% of global income.
Step-by-step explanation:
Considering the provided data and the concept of Triad countries, which generally refers to the three regions of North America, Europe, and Japan that dominate global economic activity, the answer to the question is not directly provided in the options A-E but can be deduced. When evaluating the statements, it’s evident that the high-income countries, which can be said to largely overlap with the concept of Triad countries, account for approximately 68.3% of global income and 12% of the world's population.
This data contrasts with the statement given in option B, which claims the Triad accounts for around 75% of world income as measured by GNP, and this figure is slightly higher than the actual. So, the closest statement to the truth is Option B, but it is still not completely accurate according to the information provided.
It's also important to note that the option C cannot be supported by the information provided, as the Triad countries do not strictly adhere to equally distributed economic sectors. Options A, D, and E are evidently incorrect as they understate or overstate the proportion of global income accounted for by the Triad countries. Therefore, while no option is precisely correct, B is closest to the data we have on high-income countries which approximate the concept of the Triad.