【单选题】

The client has a newly positive Mantoux skin test although she does not have active tuberculosis. Which medical therapy would be appropriate for her
A．Reevaluating the client's condition every 6 months.

B．Performing a repeat skin test every 6 months.
C．Administering isoniazid for about 9 months.
D．Administering isoniazid until the skin test reverts to negative.