Which of the following is equal to Start Root 18 x superscript 7 baseline y superscript 6 baseline End Root?

(1 point)
Responses

3 x superscript 5 baseline y superscript 4 baseline
Image with alt text: 3 x superscript 5 baseline y superscript 4 baseline

9 x superscript 6 baseline y superscript 5 baseline
Image with alt text: 9 x superscript 6 baseline y superscript 5 baseline

3 x superscript 5 baseline y superscript 4 baseline start root 2 end root
Image with alt text: 3 x superscript 5 baseline y superscript 4 baseline start root 2 end root

3 x superscript 3 baseline y superscript 3 baseline start root 2 x end root

The correct answer is: 3 x^5 y^4.