Answer:
Millie might not be able to attend the play tonight because she still has to find someone to watch her two-year-old daughter for the night.
Step-by-step explanation:
A compound adjective is a type of adjective where there is more than one adjective that is combined to modify a noun. The adjectives are always hyphenated.
Option D is the correct answer because it corrects the error of not hyphenating the compound adjective "two year old daughter"