Is the example a complete sentence, sentence fragment, or run-on sentence?

To notice in what ways our old neighborhood has changed.

Arun-on sentence
Bcomplete sentence
Csentence fragment

Verified Answer :

The correct answer is C. Sentence fragment. This is because the sentence is syntactically such that it has no clear meaning, which is why it requires a context or a creation of a newer, more complex sentence. An example would be if we transformed it into "It took us a while to notice in what ways our old neighborhood has changed" or something similar.