Given below are four jumbled sentences. Pick the option that gives their correct order. 
A. It requires continuous learning and sacrifices.
B. To raise well behaved and responsible children one should be willing to invest a considerable amount of time, patience and energy. 
C. Instilling and inculcating good values in a child will go a long way in making him/her a good person and a better citizen. 
D. There is no doubt that parenting is among the most difficult and demanding tasks in the world.