The correct answer is: D. no article
The reason is that the word “road” is a common noun, which means it refers to any road in general. In this case, Rachi is not entering a specific road, but rather any road that happens to be one-way. Therefore, we do not need to use an article.
The other options are incorrect because they would imply that Rachi is entering a specific road. For example, if we used article “a”, it would imply that Rachi is entering one road out of many possible roads. If
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