Answer:
Oslo is colder.
Explanation:
Which ever one is furthest away from 0.
Think money. Which would you rather be - - 5 dollars in debt or - - 12 dollars in debt? That is the same question you are trying to solve.
You should say that you want to be 5 dollars in debt. That means that Copenhagen is the "warmer" place since it only - 5oC
- 12 degrees is a lot colder. It is much deeper below zero.