Which will be the least stable resonating structure?

Which will be the least stable resonation structure: (A) CH_(2)=CH-CH^(+)-CH^(-)-NH_(2) (B) CH_(2)-CH^(+)-CH=CH-NH_(2) (C) CH_(3)-CH=CH-CH_(2)-NH_(2)^+

The most stable resonating structure is

The most stable resonating structure is

Which is the most stable resonating structure?