The correct answer would be C "They were from all parts of the world."
Step-by-step explanation:
As scientists analyze and interpret their data , they generate hypotheses, theories, or laws which help explain their results and place them in context of the larger body of scientific knowledge. These different kinds of explanations are tested by scientists through additional experiments, observations, modeling, and theoretical studies. Thus, the body of scientific knowledge builds on previous ideas and is constantly growing. It is deliberately shared with colleagues through the process of peer review , where scientists comment on each other's work, and then through publication in the scientific literature , where it can be evaluated and integrated into the body of scientific knowledge by the larger community. And this is not the end: One of the hallmarks of scientific knowledge is that it is subject to change, as new data are collected and reinterpretations of existing data are made. Major theories, which are supported by multiple lines of evidence, are rarely completely changed, but new data and tested explanations add nuance and detail.