Final answer:
Holly can lawfully include her 25-year-old daughter Naomi on her health insurance plan until Naomi turns 26, according to the Affordable Care Act.
Step-by-step explanation:
If Holly pays for the health insurance of her 25-year-old daughter Naomi, the correct statement is that Holly can include Naomi in her health insurance plan. Due to the Affordable Care Act (ACA), children can generally remain on a parent's plan until they turn 26, regardless of whether they are married, living with the parent, in school, financially dependent on the parent, or eligible for their own employer's plan. So, Holly is fully entitled to provide health insurance for Naomi by including her on her own policy.