You can upload it using both ways, it is up to you. You upload either via the organizer using an Archive build or using the Application loader uising a compressed release build. I have tried both methods and I personally think that it is easier using xcode's organizer.
But again this is all up to you. Sometimes you can have problems with the organizer, or you get errors back, if that happens then try using Application Loader. I haven't had any problems with Application Loader yet.
So overall lets say, Application loader is the classic, safe but longer way, xcode's organizer is the easy and fast, but sometimes buggy way. Aswell I have encountered a problem where I couldn't build for Archiving, the 'Build for Archiving' button in the build tab was not enabled and I couldnt use the organizer, that's when I used Application Loader and it worked just fine.
I recommend using the Application Loader to select your binary and submit to iTunes Connect. Xcode can submit, but I personally think that Application Loader is less buggy for it has been around for 3+ years.
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.