Given the following table myTable:

$\backslash$table$[[$Given the following table,,$],[$PKEY$,$C$-1,$C$-2],[1011,$John Abel,$0],[1023,$Lee Robins,NULL$],[1034,$Ferguson,$322],[1043,$Harvey Hansberg,$179],[1052,$Kohl Kent,$7732],[1067,$Wendy Stein,$0]]$

Query: select COUNT$($DISTINCT C$-2)$ from myTable;

The results from the above query will be $$

$4$

$0$

None of the choices

$0$

$6$

$0$

$5$