Read the following passage and answer the item that follows. Your answer to this item should be based on the passage only. Scientific knowledge has its dangers, but so has every great thing. Over and beyond the dangers with which it threatens the present, it opens up as nothing else can, the vision of a possible happy world; a world without poverty, without war, with little illness. Science, whatever unpleasant consequences it may have by the way, is in its very nature a liberator. Which one of the following is the most important implication of the passage?

• A. A happy world is a dream of science.
• B. Science only can build a happy world, but it is also the only major threat.
• C. A happy world is not possible without science.
• D. A happy world is not at all possible with or without science.