The kind of investigation used in the scenario above will be either primary or secondary investigation.
If they wanted to carry out an investigation from scratch using their own parameters, case-controls, and random sampling from scratch perhaps so they can have control, then that would be the primary investigation.
Secondary investigation on the other hand gleans off information already researched and provided at the primary investigation level.
Learn more about primary investigation at:
https://brainly.com/question/13672588
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