The old-age dependency ratio (OADR) refers to ______________
a. the number of elderly living independently compared to the number in nursing homes
b. the number of elderly with chronic illnesses compared to the number without any illnesses
c. the number of elderly living with extended family compared to the number living with just a spouse
d. the number of persons aged 65 or older compared to the number of persons ages 20-64
Answer: D
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