B. Not all adults should have the vote. (when you retire from work, you should have your right to vote retired too.)
So someone’s worthiness in society only depends on whether or not they have a job?
I'm hoping Andrew will elaborate on this too. I've run into this position before, usually advocated for in extremely crass terms (either what you're saying or "old people are a structurally conservative group of voters and people who disagree with me shouldn't vote"), but I trust him to have an at least somewhat sounder rationale for it.
It's less that older voters are conservative (and certainly not economically conservative); in some nations (UK) they have become frightfully monolithic to the point at which genuine ebbs and flows of public opinion in voters of working age in response to policy/economic shifts don't impact on the electoral outcome. And they don't impact because older voters are often protected from the effect on the basis of benefits or sizable under taxed assets.
It's a flippant response (because I don't think I actually hold views in that quadrant!) but I do think something has to be done in terms of the structure of decision making and voting. Particularly on constitutional matters. I am generally in favour of more policy referenda that could be restricted to different demographic groups that it effects. And that would include restricting younger voters in some matters too.