Cho \(\int\limits_1^5 {f\left( x \right)} dx = a\)...

Câu hỏi: Cho \(\int\limits_1^5 {f\left( x \right)} dx = a\) và \(\int\limits_1^{2018} {f\left( x \right)} dx = b\). Khi đó \(\int\limits_5^{2018} {f\left( x \right)} dx\) bằng

A  \(b - a\).                                 

B  \( - a - b\).                             

C  \(a - b\).                                 

D  \(a + b\).