Which entity is they this sentence?

MySpace lost millions of users to Facebook, but they were not able to crush them completely.

OPTIONS:
- MySpace
- Facebook
Facebook
Vilket väsen är det här straffet? MySpace förlorade miljontals användare till Facebook, men de kunde inte krossa dem helt. ALTERNATIV: - MySpace - Facebook
What entity is this punishment? MySpace lost millions of users to Facebook, but they could not crush them completely. OPTIONS: - MySpace - Facebook
Facebook
Facebook