Which dress

First of, CONGRATULATIONS! Your hard work paid off and you look amazing!

I would say to go with Dress B:
-You seem confident
-It gives you shape
-Has a nice balance on the shoulders

Dress A is very close, but I think if you were to do a more fitted shape, the design needs to be "elongated" and not hit at the hips. For example, the Fiona dress by Maggie Sottero has a design that makes the wearer look taller, rather than having it hit all at once.

I love dress C

I like Dress C the best, and if I were you, that would be the only one I wore. Personally, I think it's more trouble than what it's worth to have two dresses. I wore a ballgown and had no trouble wearing it for both my ceremony and reception. If you really want a second dress, though, then I like B the best.

Dress B is an excellent option.