Evaluate the Definite Integral $\int_{0}^{1}(2 x+1)^{3} d x$
A) 20
B) 10
C)

Evaluate the definite integral $\int_{0}^{1}(2 x+1) ^{3} d x$ .

A) 20
B) 10
C) $\frac{81}{4}=20.25$
D) 40