Question

nasa space missions should be grounded
since it was established in 1958, the national aerospace and science administration (nasa) has spent more than 500 billion dollars on space exploration. budget proposals for nasa can top nineteen billion dollars a year. recent government projects include funding a space mission to mars as well as a mission to jupiters icy moon, europa. however, spending billions of dollars in space is a mistake. the united states government should stop spending money on space missions. these missions are too often unsuccessful, resulting in significant financial loss. private agencies can conduct similar work at a lower cost, so many of nasas efforts are unnecessary.
what does the fourth paragraph do?
it admits that nasa has been more valuable than private companies would be.
it argues that further scientific advancement is only possible through continued funding for nasa research.
it admits that nasa expenses are necessarily high.
it provides details about advancements in science and technology due to nasas space exploration.

Explanation:

The fourth paragraph presents the author's stance that NASA space missions are a mistake. It gives reasons like frequent unsuccessfulness leading to financial loss and mentions private agencies can do similar work at lower cost, thus making NASA's efforts unnecessary. None of the options A - D (except the correct one which is not listed here as the user might have a formatting error in presenting options. But based on the text, the paragraph is arguing against NASA's space missions. However, if we assume the options are mis - numbered and the correct one is the one that aligns with arguing against NASA's efforts):

• Option 1: The text says private agencies can do it cheaper, so it's not admitting NASA is more valuable.
• Option 2: The text is against funding NASA, not arguing for it.
• Option 3: The text says NASA's efforts are unnecessary (so expenses are not necessarily high as per the argument).
• Option 4: The text is against NASA's space exploration, not providing details about its advancements.

Answer:

None of the provided options are correct. The paragraph argues that NASA space missions are a mistake (with reasons like financial loss and private - agency alternatives).