Which will be the least stable resonating structure?
A. `CH_(2)=CH-overset(o+)CH-overset(Ɵ)CH-underset(* *)overset(* *)NH_(2)`
B. `overset(Ɵ)CH_(2)-overset(o+)CH-CH=CH-overset(* *)NH_(2)`
C. `overset(Ɵ)CH_(2)-CH=CH-CH=overset(o+)NH_(2)`
D. `CH_(2)=CH-overset(Ɵ)CH-CH=overset(o+)NH_(2)`