Question

Kyla is writing an argument against sending humans into space. Read Kyla’s argument and think about any revisions she needs to make. Then, answer the questions that follow.


Why Space Exploration Shouldn’t Include Humans

 (1) Their are many reasons for continued space exploration. (2) None of these reasons, however, will require that we send humans into space. (3) Using human explorers makes sense in the early years of the space program because we did not have robotic technology yet. (4) In more recent times, technology has allowed us to gather information without any help from humans.
 (5) Robots do not need life support or a return trip home. (6) For these reasons, sending robots into space is much more cost effective than sending humans. (7) In a 2018 report, the Congressional Budget Office projected that cutting human-centered space exploration programs would save $89 billion over a nine-year period. (8) In addition, cutting human exploration programs virtually eliminates any risk to human life.


Which revision of sentence 2 adds an infinitive phrase that functions as an adverb to tell more about why we would send humans into space?
A. None of these reasons, which are all valid, however, will require that we send humans into space.
B. None of these reasons, however, will require that we send humans into space to conduct research.
C. None of these reasons, however, will require that we send humans, who are not replaceable, into space.
D. None of these reasons, however, will require that we send humans into space, where they will be at risk.

Review Progress

Answer 1

B

Explanation: Option B adds the infinitive phrase "to conduct research," which functions adverbially to express the purpose (why) we would send humans. The other choices add relative clauses or a clause of place, not an infinitive adverbial.