Debo, I think because yo goes with -o.
The answer to the first one is 1) Las comedias son serias. The answer to the second one is d. Miguel y Yolanda I believe. I hope this helps and I hope I didn't get either of them wrong. They seem about right to me.
I believe it's Voy, because that is the "I" or "Yo" form of the word "ir", meaning "to go".
Where are you going to eat?
(I am going to) The restaurant.
¿Adónde vas para comer?
Voy al restaurante.
