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The correct answer is:
b. tenías
Explanation:
- The verb "tenías" is the correct form in this context when talking about "tu" (you) as the subject.
- "Yo" means "I," not "tu," so "Yo tenía" is incorrect.
- "Mi propia habitación" is the object of the sentence, not the subject, so it does not affect the verb conjugation.
- "Tenías" matches with the subject "tu" (you) in the past tense.
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