Final answer:
After calculating a 20% increase in the price index, Nate's Social Security payments should be $264 in Year 2, making option d correct.
Step-by-step explanation:
The question asks how much Nate's Social Security payments would increase if the price index rose from 90 to 108 between Year 1 and Year 2.
First, calculate the increase in the price index: (108 - 90) / 90 = 0.2 or a 20% increase. Next, apply this percentage increase to Nate's original Social Security payment:
$220 × 1.20 = $264.
Thus, Nate's Social Security payments for Year 2 should have been $264. Option d is correct.