What is the difference between an array and a pointer, in C$,$ in these prototypes:

int foo $($uint$64\_$t$*$ p$)\{...\}$

int foo $($uint$64\_$t ar$[])\{...\}$

A$.$ One cannot use the syntax $*$ar$,$ since ar is an array.

B$.$ One cannot use the syntax p $[3],$ since p is a pointer.

C$.$ There are no differences.

D$.$ They are the same, but one cannot write p $=$ ar or ar $-$ p$.$