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All of your options are viable, a lot of it comes down to cost.
Fluoros (which CFLs are) work well for veg as long as you have enough. I still prefer MH for veg, but the fluoros work. To me the issue is that by the time you buy enough CFLs, and fixtures, and do all the wiring, I don't think you would save money compared to just buying a MH bulb.
As between your options B and C, I don't think there is any difference in performance (delivery of effective light to the plants), just two technical approaches to the same question. If one set-ip is cheaper than the other I would go with that.
Personally I use option C like Chimera. More specifically I use a MH conversion bulb for veg and HPS bulb for flower run off a single HPS ballast, and I also supplement with CFLs in the corners of my grow box, daylights during veg and warm whites during flower.
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toastybiz
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