Tetrathionate Broth Is a Selective, Enrichment Medium for S

Tetrathionate broth is a selective, enrichment medium for S. enterica. What does this mean?

A) This is a medium that encourages the growth of normal microbiota and reduces the growth of S. enterica.
B) This is a medium that inhibits the growth of some bacteria and enhances the growth of S. enterica.
C) This is a medium that inhibits the growth of some bacteria and in which S. enterica colonies exhibit an identifiable color.
D) This is a medium that facilitates the growth of all bacteria but enhances the growth of S. enterica.
E) This is a medium that facilitates the growth of all bacteria but in which S. enterica exhibits a noticeable color.