___ she is a good runner but I have not seen her running.

The word “apparently” fits the sentence; indicating that the speaker has heard or believes the girl is a good runner but has not witnessed it; implying a sense of hearsay or assumption. “Possibly” suggests uncertainty; “doubtfully” implies disbelief; and “none of these” is incorrect since “apparently” is appropriate. This question tests understanding of adverbs and their contextual use in English; with option B being the correct choice.