Which is the simplified form of the expression (StartFraction (x Superscript negative 3 Baseline) (y squared) Over (x Superscrip
t 4 Baseline) (y superscript 6 Baseline) EndFraction) cubed? A. StartFraction 1 Over x Superscript 4 Baseline y EndFraction
B. StartFraction 1 Over x Superscript 21 Baseline y Superscript 12 Baseline EndFraction
C. x cubed y Superscript 12
D. x cubed y Superscript 24