Yes, you do all of “A” then “B”, “C” , etc. A is typically a set number of reps/sets while B and C are typically as many rounds in a set time as you can do, and D is pretty varied.
I will have to get back to you on gun show. Conditioning is built in the strength and conditioning workouts, but for those doing the build they can do what conditioning they want. Many at the gym do the conditioning from S&C workout (typically D). Max RDS I believe is Max rounds. I’ll check all this with JC