One Reason Why It Is Difficult to Reform an Existing

One reason why it is difficult to reform an existing welfare system is that

A) the people who provide these services currently are not willing to see their programs eliminated.
B) any reform provides disincentives to both taxpayers and welfare recipients.
C) the system has been fine-tuned to the point where further reforms are not cost effective.
D) most families receiving assistance are lazy and would not benefit from welfare reforms.
E) welfare is a right provided for in the Constitution.