NCLEX is currently ABC because they haven't updated the questions. They are updating in April when I'm guessing it will switch to CAB. I didn't have any "who would you see first" questions that were that tricky. They were obvious.
Another way to think about it is Acute (unstable) vs. Chronic (stable). Asthma patients an often dyspenic (chronic), and unresponsive MI is very acute and unstable; if you doesn't act, asystole is the most stable ECG rhythm.
This framework doesn't fit perfectly here, but it's worth remembering.