Chemistry: The Molecular Science (5th Edition)

Phenolphthalein is the most suitable, because it changes its color in basic solutions, and the equivalence point of the titration between $KOH$ and acetic acid is in basic solution.
Acetic acid is weak and $KOH$ is strong; therefore, the pH at the equivalence point of their titration will be basic $(pH > 7)$. Analyzing the 3 given indicators on page 667, the one where the color changes in a basic solution is the most appropriate, so Phenolphthalein is the correct answer.