From the stability constant (hypothetical vlues ) , given below, predict which is the most stable complex ?
A. `Cu^(2+)+ 4NH_(3)hArr[Cu(NH_(3))_(4)]^(2+)`
`K = 4.5xx10^(11)`
B. `Cu^(2+)+4CNhArr[Cu(CN)_(4)]^(2-)`
`K = 2.0xx10^(27)`
C. `Cu^(2+)+2enhArr[Cu(en)_(2)]^(2+)`
`K = 3.0xx10^(15)`
D. `Cu^(2+)+4H_(2)OhArr[Cu(H_(2)O)_(4)]^(2+)`
`K=9.5xx10^(8)`
