An identifier's scope refers to

A$.$ the type of memory $($text segment, stack or heap$)$ where the variable is allocated.

B$.$ the variable's exact or inexact data type

C$.$ the location in the program where that identifier can be referenced

D$.$ the linker making the variable external

E$.$ its pass$-$by$-$value, or$,$ pass$-$by$-$reference property