If \(S_{r}=\left|\begin{array}{ccc}2 r & x & n(n+1) \\ 6 r^{2}-1 & y & n^{2}(2 n+3) \\ 4 r^{3}-2 n r & z & n^{3}(n+1)\end{array}\right|\), then the value of \(\sum_{r=1}^{n} S_{r}\) is independent of
(A) \(x\) only
(B) \(\mathrm{y}\) only
(C) nonly
(D) \(\mathrm{x}, \mathrm{y}, \mathrm{z}\) and \(\mathrm{n}\)