Recall that the UART base address is $0$xF$0000000$ and the UART registers and buffers used in Project $3,$ in command register, status register, and receive buffer. If register $s$0$ contained $0$xF$0000000,$ what address $sO would need to be used in order to access the receive buffer?

$-8$

$-4$

$0$

$4$

$8$

None of the above