Final answer:
The correct answer is A. Hay.
Step-by-step explanation:
The correct answer is A. Hay. In Spanish, the verb 'hay' is used to express the existence of something or someone. So, the question '¿_____ gente en la fiesta?' is asking 'Are there ____ people at the party?'. The correct translation would be '¿Hay gente en la fiesta?' which means 'Are there people at the party?'
Learn more about Spanish verb conjugation