What is the median of the following list of $4042$ number?  $1$, $2$, $3$, $\cdots $, $2021$, $1^{2}$, $2^{2}$, $3^{2}$, $\cdots $, $2021^{2}$ 
选项为:A:$$1974.5$$  B:$$1975.5$$  C:$$1976.5$$  D:$$1977.5$$  E:$$1978.5$$  请回答其中一个选项.