Which of these careers would use a specimen to do its work?

Answer:
B. marine biologist
Explanation:
A specimen is defined as "an individual animal, plant, piece of a mineral, etc., used as an example of its species or type for scientific study or display." Marine biology is the study of marine life, which is organisms in the sea. Out of the aforementioned options, only a marine biologist would study a specimen like a marine animal or plant.