I think option C really depends on the people in the conversation. Some people see ANY push-back, not matter how nicely stated, as the artist getting defensive. Meanwhile the artist may just be trying to get to the bottom of what the critiquer is trying to communicate. This happens all the time in professional and amateur settings. Arbitrary words like 'pop' and 'focus' and 'that's the right ball park' are thrown around with out ever pointing our specifics. Artists NEED specifics, and when we get frustrated trying to figure out what part of 'the ball park' the other person is looking for suddenly the artist is 'getting defensive'. Then the critiquer gets defensive because they feel the artist is being combative.
We actually went through this 'well intentioned but totally unhelpful' kind of crit with an old contact at a convention today.
They asked what I was up to since I saw them last, and I showed them our comic, Kamikaze! I hand over my phone to show them the comic and they immediately say the colors look muddy.
"Oh, okay. So like everythings too close to a single color?"
"Oh no, the color pallet is beautiful! It's just muddy.".
"Like blurry?"
"No..."
"Okay. So how would you suggest I fix that?"
"Just make it less muddy. Make things POP more!"
"Add highlights?"
"No."
I try to suss out what this person is trying to get at, and I'm just lost. They keep using unspecific words, and as the conversation goes on, I can tell they're struggling to communicate the idea. The problem is they never managed to tell me exactly what they meant by muddy. I tried digging for it, offering suggestions (more highlights, less shadows, more/less texture), but none of those were right. One minute muddy meant flat, another minute it meant there's not enough shading, and then it was too much shading. Then it went from not enough saturation to too much saturation. The whole critique was a mess, and I while I understand they wanted to help, they just confused the hell out of me. By the end I just said, "I'll keep that idea in mind," and changed the subject.
I don't think it's impossible for two people to have a type C critique like you suggest @keii4ii but I do think there has to be a clear understanding of what the artist is trying to do, and what the critiquer is trying to convey. It's an exercise in frustration when an anatomical artist tells a rubberhose style cartoonist that they need to work on their anatomy. That's literally what rubberhose styling is thumbing its nose at.
Ultimately I think both parties in a type C critique have to come to an agreement that they understand :
A. what the artists goals are
B. are willing to back up their ideas with specific items
and
C. focus on what makes the artist goals realized