Use the following information below, which of the following statements is CORRECT.

M$$X

$P=$

$30x+40Y$

$4x+2Y16A$

$2x-Y2B$

$Y1,C$

$x,Y0$

Constraint $C$ has a surplus of $4$

Constraints $B$ and $C$ have a slack of $O$

Constraint A has a slack of $2$

Constraints $B$ has a slack of $4$

Constraints A and $C$ have a slack of $O$