Rough opening is too small for sliding patio doors
You’re better to go with Option C which you haven’t thought of. Those jack studs will need to be replaced as well.  Not sure about the codes where you’re at, but I’m not aware of any region that would allow you to scab on to the top of the jacks to fill in the gap between them and the header.  Everywhere I’ve built in my 25+ years in the industry requires a solid mechanical connection between the header and bottom plate, which is also sistered to the king studs.
You’ll need to build a temporary wall as close to the opening as possible to carry the weight while you work. Then remove the header and both jacks, and redo everything to be the right height.
In the future, you’re better off making rough openings taller when you’re not sure about the needs of a particular door or window.  You can even put your header all the way up to the top plate and have your cripples come down to a 2x4 (or 2x6 depending on your studs) nailer.  Either way you do it, the header carries the load across the door/window.