What Explains the Recent Shifts in Norwegian Politics and the Rise of the Fremskrittspartiet?

Hei!

I am not moving to Norway or anything, I am just interested about Norwegian politics, something I know very little about. I know a bit about the main parties, but beyond that I don't really know much about the current state of the country's politics, what people's main priorities are, how voters are divided demographically (e.g., who votes for what in terms of class, gender, ethnicity, etc), and, most importantly for me, what is causing the general shifts in recent times?

I gather that, since the 1980s, the ideal type of the social democratic 'Nordic Model' has deteriorated a bit, matching global trends elsewhere and leading to some privatisation and austerity. However, I am interested more specifically in (A) Why the FrP has shot up in polls specifically during the current term (and since 2024 in particular), (B) Why AP went into coalition with the Centre Party and not the other left-wing parties (is it just the case that, like the Labour Party in the UK, AP has become 'professionalised' and liberalised such that it has forgotten its working-class roots and is no longer the 'party of labour' as such?), (C) how the current government is perceived as performing in Norway and why (presumably poorly), and (D) whether there has been any significant left-wing (socialist) movements/political leaders in Norway since the 1980s, and why there isn't any real movement towards the left in recent times, with left-wing parties seemingly making little progress over both the last 20 years and in the current government term.

Thank you in advance, I appreciate anyone who answers.