I've got mine running with a 07 donor as well so I can check when I get home. Your pics came in pretty small so it's a little hard to make out.
A looks like part of the PCV system, if it's leading to the left valve cover that's what it is and it connects to the PCV 1-to-2 hardline that goes in front of the intercooler, this hose here:
A.png
B I'm having trouble with, I "think" that's where the brake booster attachment is but low certainty on that. If that's the case, it was a nipple threaded into a BSPT threaded hole and I ordered a plug off of McMaster (unless you're doing a power brake setup)
C I am not finding a photo in my gallery that has that area but I suspect that may be another leg of the PCV system, check and see if that goes to one of the 2 nipples on the top of the right valve cover; If so, that's what it is:
C.png
D I think is also in my first picture, that went to the bypass valve. On my motor it had a T attached to it that I think went to a boost pressure gauge in the car, not sure if that was stock location or not since my donor car was significantly modified.