A.\(\dfrac{{{5^x}}}{{\ln 5}} - \dfrac{{{x^2}}}{2} + C\)
B.\({5^x} - {x^2} + C\)
C.\({5^x}\ln 2 - \dfrac{{{x^2}}}{2} + C\)
D.\(\dfrac{{{5^x}}}{{\ln 5}} - 1 + C\)