A looks like a pullet, B I'm more inclined to pullet, and C I'm more inclined to cockerel.
But SS are rather tricky, so B and C could still go either way.
A is a Pullet
B is a Pullet
C is a Cockerel
Final answer or until we get updated pics, but that would be my guess, I absolutely adore SS's, congrats on the beautiful birds.