Final answer:
The pronoun 'we' in Spanish is translated as 'nosotros' and would be used when saying 'my brother and I.'
Step-by-step explanation:
When referring to yourself and your brother, you would use the pronoun 'we,' which is translated as 'nosotros' in Spanish. So the correct answer would be choice C. 'Nosotros.'
Learn more about Pronouns in Spanish