Her mother painted the room her favorite colors (pink and yellows).
Explanation:
You use parentheses to insert extra information that a statement would still be correct without. So you can't have parentheses around parts of a sentence that, if removed, would make the sentence incomplete.
The answer I chose here doesn't need to say that the mother's favourite colours are pink and yellow for the sentence to be complete, so it is stated in parentheses. Removing the part in parentheses would not make the sentence incomplete because the sentence still works without it.
In all the other statements, removing the part in parentheses would have the statements make no sense, which means that the parentheses are incorrectly placed.
