If \(\varphi(t)=\left\{\begin{array}{l}1, \text { for } 0 \leq t<1 \\ 0 \text { othenise then }\end{array} \int_{-3000}^{3000}\left(\sum_{r=2014}^{2016} \varphi\left(t-r^{\prime}\right) \varphi(t-2016)\right) d t=\right.\)
(A) a real number
(B) 1
(C) 0
(D) does not exist