How long has Juan Perez contributed to the Medicare system before turning 65?

When determining how long Juan Perez has contributed to the Medicare system before turning 65, it’s important to understand the context of Medicare eligibility and contribution requirements. Generally, to qualify for Medicare benefits, individuals need to have worked and contributed to Social Security for a minimum number of quarters, which typically requires about 10 years of work—equating to 40 quarters of contributions.

In this case, stating that Juan contributed for 20 years indicates a robust history of work and contributions, which exceeds the basic eligibility requirements to qualify for Medicare. This level of contribution suggests not only fulfillment of eligibility requirements but also reflects a significant investment in the system, ensuring that he has access to the full range of Medicare benefits upon reaching the age of eligibility.

The other options suggest shorter periods of contribution, which would not provide enough context for a full understanding of the Medicare system and the benefits Juan would be entitled to upon turning 65. Hence, 20 years demonstrates a comprehensive level of participation, making it the most accurate choice.