Final answer:
The individual who would NOT be subject to the kiddie tax assuming they have unearned income is a 15-year-old with income from a summer job.
Step-by-step explanation:
The individual who would NOT be subject to the kiddie tax assuming they have unearned income is d) A 15-year-old with income from a summer job.
The kiddie tax is a tax rule in the United States that applies to children under the age of 19 and to full-time students under the age of 24. It taxes a child's unearned income, such as investment income, at the parents' tax rate.
In this case, a 15-year-old with income from a summer job would not be subject to the kiddie tax as their income is earned income and not unearned income like the other options.