Evidence Showing the Outcome of a Scientific Experiment or Test

Evidence showing the outcome of a scientific experiment or test is generally:

A) admissible if the test is conducted in court but inadmissible if conducted out of court.
B) not admissible because this is incompetent evidence.
C) admissible where it is shown that the conditions under which the experiment or test was made were similar to the circumstances prevailing at the time of the occurrence.
D) admissible except when supplementing the testimony of a witness.