Answer:
B
Step-by-step explanation:
x^0 y^-3
-----------------
x^2 y^-1
When dividing powers with the same base, we subtract
x^(0-2) y^(-3--1)
x^-2 y^(-3+1)
x^-2 y^-2
When they have a negative power a^-b = 1/a^b
1
-------------
x^2 y^2
