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 Which version of the sentence correct the error in the compound adjective

To correct the error in the compound adjective, the sentence can be revised as follows:

"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."

In this revised version, the compound adjective "two-year-old" is hyphenated, making it grammatically correct.