已知数列 {an}\left\{ {a}_{n}\right\}{an} 满足 an+an+2=(−1)nn2{a}_{n} + {a}_{n + 2} = {\left( -1\right) }^{n}{n}^{2}an+an+2=(−1)nn2 ,则 {an}\left\{ {a}_{n}\right\}{an} 的前 100 项和为 ( )A. 2475B. 2500C. 2525D. 5050