Question

       Juan: ¿Qué estás sirviendo?
       Pedro: _______________
Están sirviendo la comida.
Estoy sirviendo la comida.
Está sirviendo la comida.
Estás sirviendo la comida.

Answer 1

The answer would be C, or "estoy sirviendo la comida." This would be the answer because Pedro is referring to himself. Hope I helped!

Answer 2

Hello there, I speak spanish and the answer is:
Estoy sirviendo la comida.
Pedro is responding to Juan's question. So he is talking about himself.
Hope this helps!