<u>Answer:
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Depending on the data regarding the air quality indices, the changes can be chosen to be incorporated or not incorporated.
<u>Explanation:
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- The change in the air quality indices and its effect on the national income would be needed to be devised correctly if it has to be incorporated.
- The data obtained on air quality is highly vulnerable to fluctuation based on the methods of data collection.
- As it is difficult to measure the impact of changed air quality indices on the economy, its incorporation in national income is also difficult.
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Answer:
D. Creating trade agreements
In the 1930's, the best time to sell your stocks would have been around mid-April (this is when they were worth the most.)The best time to buy new stocks would have been when the stock market was at its lowest point,during late October.