Since the 1960s, the medicare and medicaid programs have successfully

Increased the number of people who have healthcare.

Medicare is a federal program that provides health insurance for people over the age of 65 or for who are disabled and don't have an income.

Medicaid is a federal and state program that provides health coverage to the group of people who have low income. Both Medicare and Medicaid have increased the number of people who have health care since 1960.

D.) increased the number of people who have health insurance

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explanation: