Joey,
Nothing wrong with your 11 answers, IME/IMO, having dealt with black bears for decades all over California, Grizzlies/brown bears in Banff, and black and brown throughout Alaska for the last 28 years.
1a 1b 2a 2b and 3a are more timid than I would be with a black bear, but not wrong. 3b is correct for a black but (not that you were asking) wrong for a brown bear. Don’t challenge a brown bear (unless it starts chewing on you).
Like in the Sierra, there have been no brown bear in dozens of generations of black bears (brown bears kill and eat adult black bears) around Rainier so if there’s no hunting in the area, they’re not used to being scared off. And you’re most likely to see the most habituated bears with the least fear and most experience with humans running off and surrendering their food.
And yet, every time I’ve run at a black bear, yelling and waving a stout stick, intent on bashing it with the stick when I get there, it’s never there when I get to the food hang or our camp. It does surprise the bear initially, but they seem to dredge up genetic memories of having been second banana since at least the last ice age, 11,000 years ago and only getting a free pass for the last century. It reminds me of being scared of the territorial dogs on my newspaper route as an 11-year old and therefore they’d chase me. Once I realized I didn’t need teeth or fangs, just acting skills, neither dogs or black bears have been an issue. My one thought is beating the crap out of it when I get to it and it picks up on that. BUT NEVER DO THAT WITH A BROWN BEAR.
I’d argue my approach is also best for the very rare predatory black bear – typically an old injured one who needs the calories enough to tolerate getting Goretex stuck in its teeth and goose down up its nose.
Also, not about black bears, but here’s former BPLer Erin and her husband Hig (my wife and son just got off a trail work BPing trip with them) doing everything right with a hungry spring brown bear in the middle of nowhere Alaska. Agencies ask for permission to use it for training since they can’t recreate such a situation, although the comment section is predictable idiotic, being it’s YouTube: