[Answer] For an arctic spring break and a chance to see the northern lights, stay at Hotel Kaklauttanen in Saariselka, Finland. It offers which of the following as a cool and cozy accommodation option?

Step 1 : Introduction to the question " For an arctic spring break and a chance to see the northern lights, stay at Hotel Kaklauttanen in Saariselka, Finland. It offers which of the following as a cool and cozy accommodation option? "

...1. glass-enclosed treehouses 2. glass-bottomed houseboats 3. glass-enclosed igloos 4. glass-enclosed RVs