Final answer:
The correct answer is C. Tenías.
Step-by-step explanation:
The correct answer is C. Tenías.
In this sentence, the verb 'tener' is conjugated in the past tense to match the subject 'tú' (you) in the question. The question is asking 'Did you have to study a lot for the science exam?'. The correct conjugation for 'tú' in the past tense is 'tenías'.
The other options do not correctly match the subject and tense of the question. 'Tuviste' is the past tense conjugation for 'tú' in the singular form, 'tuvimos' is the past tense conjugation for 'nosotros' (we), and 'tuve' is the past tense conjugation for 'yo' (I).
Learn more about Conjugation of the verb 'tener' in Spanish