Answer:
I think it's none of them
Not A because the youngest baby boomer would be about 54 and middle age goes up to 65 so they would place strains on medicare.
Not B because if they're someone in power (such as president etc) then they can influence demands for goods and services.
Not C because most candidates are super old and the current US president is like 73
Not D cause I guess you can apply for early retirement when you're 62 and the oldest baby boomer is 74.
Hope this helps, sorry if I'm wrong!
Explanation: