I’m pretty sure it’s C
Because it says nosotros
Yo creo que fue muy difícil para ellos
Answer:
The right answer is, C. Tener que.
Explanation:
Because when we speak in the first person and we are going to carry out some activity or commitment, to report that we have something to do we use the expression "Tengo que".
example, I have to do the dishes before going to play.
* Tengo que lavar los platos antes de ir a jugar.