By POE i also went for E
However I think the question is not so clear :
Economies in which a high percentage of resources are invested in research and development show greater growth in the long run
than do those in which resources are channeled into consumption. Japanese workers spend a higher percentage of their income investing in research and development than do American workers.
To grow as fast as Japan has in the past three decades
, the United States must change the tax code in order to encourage savings and investment and discourage debt.
The facts tell us that if you invest in R&D there will be a greater gowth on a long term basis. Then the following paragraph just asks the good solution to grow as fast as japan. If USA can reach the same growth than Japan in one day, why not ? It is not said that they want to spend the same amount of time to reach this target.
In that case C would be ok. I mean I think that E is the correct answer but I still think the way this problem written has been is questionnable. Maybe I've overlooked at it