The correct answer is C. exactly.
The word “exactly” means “in every detail; precisely.” In this case, the speaker is saying that all the streets looked the same, with no differences. This could be because they were all very similar in terms of their appearance, or it could be because the speaker was not paying attention to the details.
The other options are not as accurate. The word “decisively” means “in a firm or confident way.” This does not make sense in the context of the sentence, as the speaker is not expressing any confidence or certainty about their observation. The word “normally” means “in a usual or ordinary way.” This is also not accurate, as the speaker is saying that the streets looked unusual or abnormal. The word “simply” means “in a plain or straightforward way.” This is not as accurate as “exactly,” as the speaker is not simply stating that the streets looked the same, but rather that they looked exactly the same.