In People v. Melendez, the trial judge refused to allow a defense witness to testify because the witness had a sequestration order and had conversed with the defendant at some point during the trial.

A. must prevent a witness who has violated the sequestration order from testifying when that request comes from the opposing party.

B. initially should have determined whether a violation of the sequestration order actually occurred prior to imposing a sanction.

C. properly imposed the only sanction that law allows the judge to use.

D. made a mistake in preventing the witness from testifying because the public and the defendant have the right to a public trial where may attend if space is available.