Given the following information:

$\backslash$table$[[$JOB $($hours$),$Resource A$,$B$,$C$,$D$],[1,5,8,7,7],[2,4,9,5,9],[3,6,9,8,7],[4,7,6,6,9]]$

What is the optimal assignment of resources to jobs?

$1$ to $A$;$2$ to $C$;$3$ to $B$;$4$ to $D$

$1$ to $B$;$2$ to $D$;$3$ to $C$;$4$ to $A$

$1$ to $C$;$2$ to $B$;$3$ to $A$;$4$ to $D$

$1$ to $D$;$2$ to $B$;$3$ to $C$;$4$ to $A$

$1$ to $A$;$2$ to $C$;$3$ to $D$;$4$ to $B$