Living in the Wizarding World (Harry Potter fanfic but it’s cool and interactive)

The station is crowded, full of excited witches, wizards, and muggle parents alike.
Your own parents have dropped you off at the station, so you have already said your goodbyes.
You weave through the crowd, pulling your trunk behind you as you make your way towards the large scarlet train.
Steam billows out from the front as you board, and you find that there are lots of compartments to choose from.
Which do you choose?