Algunos pueden no tener la misma opinión y puede causar peleas
esta would be the right way to say it
Answer:
C.) aquéllos
Explanation:
Aquéllos means those. So, you are trying to say those are cheap.
Answer:
It could be the 1st option. It try to say that we may see the face but we don't know what is in their hearts.
Explanation:
Hope it helps.