Your answer is D, i just did this one so 100% correct
The clue word "however" almost always indicates a "contrast". This is because when using this word, the writer can on one hand agree with what he or she is saying, but offer a different point of view to be considered.
They create and add suspense throughout the story, making the rising action mysterious and different so that once you hit the climax, what you thought was going to happen is completely different than what did