Arizona offers better mental-health care than most other states but still struggles to deliver services to people who are suffering, according to a national report card released Wednesday. The National Alliance on Mental Illness graded Arizona a C, marking a modest improvement over the D grade the state received three years ago, the last time the study was conducted. Arizona was one of 18 states to get a C. The national average was a D. Six states received a B; none received an A.
Arizona has the best health service.
It is not mentioned whether Arizona has the best healthcare just that they have improved therefore it cannot be incorrect. 
( z1 have :ARG0 ( z2 state :name ( z3 name :op "Arizona" ) ) :ARG1 ( z4 serve :ARG1 ( z5 healthy ) :ARG1-of ( z6 have-degree :ARG2 ( z7 good :ARG1 z4 ) :ARG3 ( z8 most ) ) ) )