From the look of it you described the birds from where they were sitting, not from the perspective of looking at them. Which makes all but one of your choices correct.
As E ORIX has said, the belly colour is usually the easiest to sex from.
At this time of year you can also use the beak colour, as the hens beaks will be starting to go very dark, while the cocks beaks will be starting to go a pearly white.
This can be helpfull sexing white breasted black head birds, as they can get similar colours on the belly.
