Answer:
Creo que los avances científicos no deben tener restricciones. Creo que no deben tener restricciones por que si tienen restricciones, nunca descubriremos cosas nuevas.
Explanation:
I believe that scientific advances should not be restricted. I think they should not have restrictions because if they have restrictions, we will never discover new things.
The sentence is plural
Estamos is the only one that fits.
