Primus, don't be emotional. We all get busy being stoned and having lives.^ This is a huge community, and if you don't get an answer as quickly as you might need, then you can pick a member that you feel has trustworthy knowledge, and download their vcard. A vcard contains that member's contact info. E-mail them.

On to your Qs.
A.) Those aren't brown. Those are bleached. Not much you can do about it, considering you're growing in a couple of totes. It's called light chlorosis. Your lights are too close, and it's sucking the chlorophyll out.

B.) Yes. You'll probably find out sooner if it's due to genetics.

C.) No, not unless they're dead/dying.