Final answer:
The correct form of "ir" to be used is "van" with the subject "Jorge y Alberto".
Step-by-step explanation:
The form of "ir" that would be used depends on the subject of the sentence. In the given options, the subject is "Jorge y Alberto" which is a third-person plural. Therefore, the correct form of "ir" to be used is "van". So, the correct sentence is C. "Jorge y Alberto van a montar en bicicleta al Parque Tairona."
Learn more about Spanish verb conjugation