I'm gonna say "D". Yellow, Blue & Orange.
How did I come up with this? Well, Reptar has been repainted Orange and Yellow and Nighthawk was repainted Yellow and Blue. Seems like there should be some Yellow, Blue & Orange paint leftover somewhere (that and everything Cedar Fair has painted in the past few years seems to have this color)!

As for what color goes where... I'm gonna say:
Rails: Yellow (if they are painted).
Track Spine: Orange with the cross members painted yellow (if the rails aren't painted yellow).
Supports: Blue.
Similar to the Dominator color scheme at King's Dominion.