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(See the complete passage discussion here: lsat/viewtopic.php?t=14608)
The correct answer choice is (A)
The author’s interpretation of the study involving the family is that not all of the code-switching in their
conversations could be explained by situational factors. If another study showed that all of the family’s
code-switching could be explained by situational factors, it would cast doubt on the interpretation
given in the passage. Demonstrating that the presumed cause (i.e. changes in situational factors) and
the predicted effect (i.e. code-switching) have consistently occurred together in the past makes it more
difficult to believe that the effect ever occurs without that cause.
Answer choice (A): This is the correct answer choice. This is the same scenario as the one described
in the third paragraph, however in this instance the code-switching was situational and not rhetorical.
This casts doubt on the rhetoric-based code-switching that the author proposes in lines 46-49.
Answer choice (B): Here, the presumed cause is shown to be present several times without the
accompanying effect. Since the author believes that the presumed cause is not always linked to the
effect, this study would not cast doubt on the author’s interpretation.
Answer choice (C): This answer choice says that on some occasions, code-switching did not occur. But
this does not help to evaluate whether or not all code-switching which does occur can be explained by
situational factors. Therefore, it cannot cast doubt on the author’s interpretation.
Answer choice (D): Discussing the results of the study in English does not constitute code-switching,
even if the family was discussing Spanish. Therefore, this answer choice cannot help to evaluate the
author’s claim regarding the causes of code-switching.
Answer choice (E): The passage indicates that the family was not even aware of their occasional use of
Spanish prior to their discussions with the researchers. When the family discovered this code-switching
and how they interpreted it is not relevant to this question.