Which of the Following Best Describes a Daubert Challenge

Which of the following best describes a Daubert challenge?

A) It is a challenge faced by the judge when the jury is equally divided over a verdict.
B) It is a method used by the jury to evaluate the testimony given during a trial.
C) It is a special hearing conducted before the trial judge to determine the relevance and reliability of an expert's opinion.
D) It is a process by which the defendant challenges the prosecution's evidence.