Yo como la sopa con a. el vaso b. la cuchara c. el tenedor

b.  la cuchara

Explanation:

Assuming here you talk about the general, more global, term of sopa... which generally means "soup", and not the sopa that is a tostada with toppings in some countries like Mexico and Guatemala, this one you just eat with your hands.

You eat the soup with a spoon (cuchara) like everyone else.  It would be quite complicated to eat the soup with a fork (tenedor) even if some soups have big pieces of meat or veggies in it.

You could use a glass (vaso) but then you would drink your soup, not eat it.

los abuelos de carlos y liza podrían ser cualquiera de las opciones, necesitamos más información para resolver esto. esperaba que esto ayudara un poco al menos.