\(\dfrac{{1000}}{{1009}} \cdot \dfrac{{ - 2018}}{{2019}} + \dfrac{{19}}{{2018}} \cdot \dfrac{{ - 2018}}{{2019}} + \dfrac{1}{{2020}}\)  
A.\( - \dfrac{{2019}}{{2020}}\)
B.\(\dfrac{{2019}}{{2020}}\)
C.\( - \dfrac{{1009}}{{1010}}\)
D.\(\dfrac{{1009}}{{1010}}\)

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