Answer:
A.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.
Explanation:
A compound adjective is a group of words that function collectively to modify a noun.
To properly hyphenate a compound adjective, there must be two or more words that acts as one idea.
Therefore, option A is correct where the compound adjective "two-year-old" is properly hyphenated.
There is only one prepositional phrase among these options, and that would be <em>under bridges. </em>The correct answer is C.
A prepositional phrase is the one which follows a preposition, in this case the word <em>under.</em>
