"Contrast" means to be different, or to differ. The answer is D. However, because "however" is used when you start to talk about something different.
I hope this helps! :D
D. its use of the natural cadences of human speech
Thanks...but I'm not going to the bank right now.
thanks...but I've got another appointment right now and I'll stop at the bank after I'm done.
thanks...but I don't think we can get there before they close.
thanks...but I forgot my coat . Can you wait just a minute