\text { 5. An antiderivative of } g^{\prime}(x)=10 e^{x}+x \text { is: } \text { A) } g(x)=\frac{e^{11 x}}{11}+\frac{x^{2}}{2} \text { B) } g(x)=\frac{e^{x}}{10}+\frac{x^{2}}{2} \text { C) } g(x)=10 e^{x}+\frac{x^{2}}{2}

\text { D) None of them }