If a recombinant $DNA$ bearing a gene for ampicillin resistance is transferred into $E. coli$ cells and the host cells are spread on agar plates containing ampicillin,then:

• A
  Both transformed and untransformed recipient cells will die
• B
  Both transformed and untransformed recipient cells will grow
• C
  Transformed recipient cells will grow and untransformed recipient cells will die
• D
  Transformed recipient cells will die and untransformed recipient cells will grow