一道形容词比较级问题,望指教--During the last decade,there have been many

一道形容词比较级问题,望指教
--During the last decade,there have been many changes in family life
--Are these changes________?
A.for the good or for the bad
B.for the worse or for the better
C.for worse or for better
D.for the worse or for the best
答案似乎是B