The answer is B maybe try it?
The describing the rule means to explain how they get to the next result then the next result then the next it is what has to happen to get to the next answer ... I hope this helps !! :)
Answer:
x^0 y^-3 / x^2 y^-1
= 1 / x^2 y^-1 (y^3) ...because x^0 = 1 and [(y^-1) (y^3)] = y^2
= 1/(x^2 y^2)
