To solve this question, let us deploy IMS's four-step technique.
STEP #1 ->
IDENTIFY THE QUESTION TYPELet us read the question prompt to identify the question type.
Quote:
Which of the following most logically completes the passage?
The stem indicates a complete the passage question.
STEP #2 ->
X-RAY THE ARGUMENTLet us now x-ray the argument and understand it.
Quote:
In cars, airbags provide good protection for the chest and head, but little or no protection for legs. A study of injuries resulting from car accidents showed that a large proportion were caused by blows to the legs. Therefore, if airbags protected this area, the risk of serious injury in car accidents would be greatly reduced, especially since____________________.
FACT #1: In cars, airbags provide good protection for the chest and head, but little or no protection for legs.
FACT #2: A study of injuries resulting from car accidents showed that a large proportion were caused by blows to the legs.
CONCLUSION: If airbags protected this area, the risk of serious injury in car accidents would be greatly reduced.
STEP #3 ->
FRAME A SHADOW ANSWERTo frame a shadow answer, we need to know what the right answer should do. Here, the author's conclusion, a hypothetical consideration, says the risk of SERIOUS injury in car accidents would be greatly reduced if airbags protected legs. None of the two facts though discuss the severity of injuries. Furthermore, the blank being preceded with 'especially since' tells us the correct answer must state why the risk of SERIOUS injury in car accidents would be greatly reduced if airbags protected legs. In other words, we are looking for an answer option that best supports the hypothetical consideration of the author.
SHADOW ANSWER: An option that explains why the risk of serious injury in car accidents would be greatly reduced if airbags protected legs.
STEP #4 ->
ELIMINATE INCORRECT ANSWERSLet us eliminate answer options that do not match the shadow answer.
A. among the drivers included in the study's sample of injuries, only a very small proportion had been wearing an airbag at the time of accident. -
NOT A MATCH -
Let us ask ourselves if it would make sense to say, 'Therefore, if airbags protected legs, the risk of serious injury in car accidents would be greatly reduced, especially since among the drivers included in the study's sample of injuries, only a very small proportion had been wearing an airbag at the time of accident.' Of course not! As per fact #1, airbags do little or no to protect legs; thus, any info about the proportion of drivers in the study's sample who were wearing an airbag at the time of the accident is irrelevant, implying we will not have an explanation for why the risk of SERIOUS injury in car accidents would be greatly reduced IF AIRBAGS PROTECTED LEGS. -
ELIMINATEB. even those drivers who drive cars with airbags have poor understanding of the degree and kind of protection that airbags afford. -
NOT A MATCH -
Any info regarding the understanding of drivers who drive cars with airbags is beyond the scope of the argument and will not explain or support the author's hypothetical consideration. -
ELIMINATEC. an airbag that included protection for the legs would have to be somewhat larger and more expensive than current airbags. -
NOT A MATCH -
The argument does not concern itself with the size or expensiveness of airbags. Importantly, airbags (regardless of their size or expensiveness) provide little or no protection for legs as per the author, so if this became a part of the argument, the author would be contradicting himself. -
ELIMINATED. although the bones in the legs are large, severe impacts in that area are very likely to cause serious injury, such as compound fracture. -
MATCHES THE SHADOW ANSWER -
Bingo! This tells us exactly why the risk of SERIOUS injury in car accidents would greatly reduce IF AIRBAGS PROTECTED LEGS. Let us perform the final check: In cars, airbags provide good protection for the chest and head, but little or no protection for legs. A study of injuries resulting from car accidents showed that a large proportion were caused by blows to the legs. Therefore, if airbags protected this area, the risk of serious injury in car accidents would be greatly reduced, especially since although the bones in the legs are large, severe impacts in that area are very likely to cause serious injury, such as compound fracture. Reads perfectly well! We have no reason to eliminate this option. -
KEEPE. drivers generally remain in their seat when they crash, which reduces the likelihood of severe impacts to the legs. -
NOT A MATCH -
We are looking for an option that supports the author's conclusion; this option, however, indicates that airbags for legs might not really serve a great purpose. -
ELIMINATEHence, (D) has to be the correct answer.