She's graceful and childish. But at the same time, Weena has her own personality. She has retained certain feelings that the other Eloi seem to have lost – gratitude, for instance. After the Time Traveller saves her from drowning, Weena keeps him company and tries to keep him safe and comfortable – in her own way.
B, because it doesn't exactly quicken as in a, no odd characters are introduced, and these not really any details we need to know that are left out. I picked B because there are intentionally larger words.
The correct answer of the given question above would be option C. The sentence that is inverted with the subject underlined is: There was a big group here last night. (Group is underlined.) The subject of this sentence is the word "group".