Sabrán
Recall that the ustedes/ellos/ellas ending takes the ending that ends in án for future tense in Spanish. Therefore, we can say ellos sabrán la verdad; they will know the truth.
Answer:
Citizens would find a way to discover them ethier way buyt if it were to be impossible, there would probably be lots of war beacuse veryone would be in one place.
Explanation:
Im not usre if this is what you meant but eh