The memory management of the computer system adopts the paging mode, and the page size is set to 4KB,  which of the address wires given by the program are used to address the offset within the page?
某计算机系统存储管理单元采用分页模式，页大小为4KB，程序给出的地址中哪部分地址用来寻址页内存储偏移地址？
A、A9~A0
B、A12~A0
C、A11~A0
D、A31~A20