A. sounds a bit more like "relief", its finally over B. sounds like "laziness" C. sounds a bit like frustration but the cause is yourself and the lack of foresight D. sounds more like frustration, you try to accomplish something but unforseen events occur that inhibit your ability to do so
I think the correct answer is B. Learning new word. Because Managing felling is about emotion which is not language skills and memorizing a pattern is about the brain so Learning new words is the right choice