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51. Unless an increasing proportion of a nation’s income is 52. As NASA plans return visits to the Moon, lunar scientists
devoted to health care, shortages in its services are likely hope for more samples from across the surface and deep
to get worse. underground to learn more about the early history of the
solar system.
A) It is likely that shortages in health care services will
continue to worsen if a growing proportion of a country’s A) In order to help lunar scientists improve their studies on
revenues is not allocated to it. the early history of the solar system, NASA is planning to
B) While an increasing ratio of a nation’s income could be revisit the Moon and get more samples from across the
devoted to health care, it would still be possible for it to surface and deep underground.
encounter worsening limitations. B) Since NASA aims to go to the Moon again, lunar
scientists are waiting for more samples from across the
C) If shortages in health care are likely to worsen within a
surface and deep underground that can provide further
country, more of that nation’s income must be devoted to
information about the early history of the solar system.
services related to health care.
D) A growing proportion of a country’s income should C) Because lunar scientists wish for more samples across
be directed at reducing the likelihood that health care the surface and deep underground to learn more about
restrictions will worsen. the early history of the solar system they hope that NASA
can revisit the Moon.
E) A higher ratio of a nation’s income is probably necessary
to ensure that the proportion of shortages in health care D) Lunar scientists who are studying the early history of
services is manageable. the solar system want to obtain new samples from
both across and below the Moon’s surface, so NASA is
planning to revisit the Moon.

E) The same way in which NASA wants to revisit the Moon,
lunar scientists wish to get more samples from both
above and below the surface so that they can advance
their studies on the early history of the solar system.

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