Recently,increases in the Costs of Hospital Care Have Slowed,because _______

Recently,increases in the costs of hospital care have slowed,because _______.

A) there are more for-profit hospitals offering lower cost care
B) fewer people are becoming ill and needing hospitalization
C) the population is younger and needs less hospitalization
D) costly technology in treating illness isn't as important now
E) of improvements in the efficiency of hospital administration