$12$ points

If a party refuses to comply with a court order to produce documents or answer written interrogatories:

the court can declare a mistrial and order the procedure to begin again.

nothing can be done at that time, but the questions can be asked again during the trial to show the judge and jury that the party would not provide relevant information.

the court can find the party in contempt of court, which can result in fines or imprisonment.

nothing can be done, since no one can be forced to answer questions; the trial must proceed as best it can.