The correct answer is A. Voy a una jineteada.
Since you need to translate the word 'I' into Spanish, which is 'Yo,' you also need to use the appropriate verb form for that particular pronoun, which is voy, in this case. Vas is for you/tu, va is for he/she/it (el, ella, usted), and van is for they (ellos, ellas, ustedes).
Making flashcards is a great way to study. :)
What got me through middleschool spanish tbh was probably making lists.
I had a separate journal for studying where I would go home and rewrite the important information there and group it based on category, for example, "Vocabulary-foods" and "Conjugations- stem changing ue verbs"
Hope this helps!
On foot en español se dice a pie