Victor assaults his investigations with excitement and, overlooking his public activity and his family far away in Geneva, gains quick ground. Later, Ardently dedicating himself to this work, he ignores everything else; family, companions, studies, and public activity, and becomes progressively pale, desolate, and fixated.
When you see a sentence not make sense it's usually because you are leaving out important words or mixing them up in the wrong way in that sentence so due to this knowledge a dangling modifier would be C.
Answer: D. To suggest an alternative.
Explanation:
Conjunctions are the words that are used in linking other words, clauses or sentences together. Examples of conjunction include or, while, and, since, but, because, nor, yet, although, unless, etc.
"Or"used is used to to link alternatives. It is used for connecting choices or possibilities or choices. In this case, or is used in suggesting an alternative. Therefore, the correct option is D.