I forget which option I chose, but it was something of "To better suite myself." which was actually an option, but a little more lengthy. I wish it had a write-in option for additional details, I am completely fine saying "I'm a transsexual and this is not just to better suite myself, but a necessary step to living fully as myself!"
But, whatever. Hope all went well. I'm awaiting my name-change hearing for mid-may.