Final answer:
The correct verb form is 'vas'
Step-by-step explanation:
The correct verb form to fill in the blank is vas (option C).
In Spanish, the verb form changes depending on the subject. The pronoun 'tú' corresponds to the second-person singular and requires the verb form 'vas'. For example, 'Tú vas a la clase de historia' means 'You go to history class'.
Options A, B, and D are incorrect because they use the wrong verb form for the subject 'tú'.
Learn more about Spanish verb conjugation