The best choice, in my opinion, is D. This is because it is best to take a break for a few hours or even days so that you can come back reenergized and ready to take on the next assignment. Take part in relaxing and stress-relieving activities while you are on a break. An example would be to take a relaxing walk outside to get out of your typical writing environment and breathe in the fresh air. Then, once ready, you could try to write again. Forcing yourself to write may only make the writer's block worse. Hope this helps!