Khẳng định nào dưới đây là đúng?
A.\(\int\limits_{ - 2}^2 {f\left( x \right)dx} = - \int\limits_0^2 {\left[ {f\left( x \right) + f\left( { - x} \right)} \right]dx} \)
B.\(\int\limits_{ - 2}^2 {f\left( x \right)dx} = - 2\int\limits_0^2 {f\left( x \right)dx} \)
C.\(\int\limits_{ - 2}^2 {2f\left( x \right)dx} = 2\int\limits_{ - 2}^2 {f\left( x \right)dx} \)
D.\(\int\limits_{ - 2}^2 {f\left( x \right)dx} = 2\int\limits_0^2 {f\left( x \right)dx} \)