Final answer:
The appropriate form of the verb 'tener' to be used in the dialogue is 'tenemos'
Step-by-step explanation:
In this dialogue, the appropriate form of the verb 'tener' should be used. The question asks 'Do you (plural) have a cat?' In response, you would say 'Sí, tenemos un gato.' So the correct option is OA. tenemos.
Learn more about Verb conjugation in Spanish