Answer: The most financially responsible way for Diego to raise the money for the apartment would be option A - to get a job in order to begin earning an income. By getting a job, Diego can start earning money to cover his expenses, including the first and last months' rent and security deposit for the apartment. This approach avoids taking on debt or relying on credit, which could create additional financial stress in the future. Additionally, having a steady source of income will allow Diego to budget for future expenses and build up savings for emergencies or unexpected costs. While opening a savings account or establishing credit could be helpful in the long term, they are not immediate solutions for Diego's current finance needs.