In order to be a good, a test used by a forensic scientist should be which of the following?
reproducible
unique
general
all of the above

Reproducible is the answer.

Correct A). Reproducible

Reproducibility is defined as the ability of an experiment or the scientific study be duplicated either done either by the same researcher or done by some other researcher independently. It is one of the main characteristics of the scientific method.

An experiment is said to be reproducible if it is repeated by another scientist or person and he uses different equipment or techniques but the same results are obtained all the time.

Hence, the correct answer would be option A.