Sentence fluency refers to the ease with which words and groups of words flow when read or spoken, so the best answer is "Combining sentences to use complex structure" although that's not a great definition.
Probably C because victors can be cruel and still be victors so yee
The only thing I can find is that Jerome had taken a very similar trip along the Thames for his honeymoon in 1888, and his experiences provided him the subject material for the novel. I don't see, in my copy, an acknowledgement to any particular person.
They have eye contact with the audience
D. to define the symbols of driving qnd guessing