3. When you visit other people’s houses, the first thing you do is remove your shoes.
A. Of course! It’s rude to trample around other people’s living quarters! – 10 pts.
B. Of course not! It’s rude to run around strangers barefoot or, even worse, in socks. – 0 pts.
C. It depends on the weather. – 0 pts.
Removing shoes in homes is customary in every former Soviet country, except perhaps Armenia. It's also customary in the former Yugoslavia and the rest of Eastern Europe.
It is interesting that removing shoes is just as big in the social democratic Nordic countries. It's hard not to shake off the impression that in a European context, removing shoes is a bit Left-wing. It is a rather levelling, egalitarian custom. Expecting guests to take their shoes off is not at all bourgeois.
In the USA it's probably seen differently. Having a shoes-off policy might indicate that you have a very expensive house and you want to show off its value to guests. Not a perception that is necessarily true. Somebody who is poor and can't afford regular carpet cleaning is likely to benefit more from a shoes-off policy than somebody who is more affluent.