Look at the "UPDATED" part of my old answer . It seems to me that it describes what you need. You should return JSON results from the action GetCategories() and convert the JSON input to the corresponding select HTML fragment inside your custom buildSelect function.
Because you use editoptions in the form editoptions: { value: { 1: 'One', 2: 'Two'} } instead of editoptions: { value: { One: 'One', Two: 'Two'} } you should modify a little the code of the action and the buildSelect function from the answer .
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.