A

$\displaystyle\int_0^1dy\int_{y^2}^{1}f(x,y)dx$

B

$\displaystyle\int_0^1dy\int_1^{y^2}f(x,y)dx$

C

$\displaystyle\int_{y^2}^{1}dy\int_0^1f(x,y)dx$

D

$\displaystyle\int_1^0dy\int_{y^2}^{1}f(x,y)dx$