Evaluate the Double Integral $\int_{0}^{1} \int_{x^{2}}^{3 x+1} 4 x d y d x$

Evaluate the double integral $\int_{0}^{1} \int_{x^{2}}^{3 x+1} 4 x d y d x$

A) 6
B) 3
C) 4
D) 5