Also, the C problem is why hyperspace is so convenient!!!
See the point where the C problem falls apart is when you start considering things like “warp drive.” Someone’s going to jump on me here, so I’ll don my asbestos suit, but anyway...
It has been mathematically proven theoretically possible to fold space-time so that you are not travelling locally faster than the speed of light, but to an outside observer you travel many times faster than light. You don’t violate general relativity (or special relativity). We already know that space-time can be formed by incredibly massive objects (stars, massive planets) so it follows through special relativity that since E=mc^2, you can replace a mass with a certain amount of energy equal to the mas multiplied by the square of the speed of light, so theoretically we should be able to (with enough energy) bend space-time.
Now, this was a VERY simplified explanation, but I will try to find a link to the paper that I read on the subject. The down side is that in order to generate sufficient energy, you pretty well need to use matter-antimatter reactions. And we currently have no way of mass-producing antimatter.
Hope I didn’t geek out too far.