I do believe that it means It suggests that the library feels cold and unwelcoming, I could be wrong though.
Love and night that is the answer
The correct answer would be a. "Laughing and talking" is not a way to start a sentence.
A run-on is a sentence that is too long, and either has no, or incorrect punctuation. So, that wouldn't be it.
A comma splice is a sentence that has a uneeded comma. This, has none.
Therefore, the answer would be a.
