They worked in factories, built railroads, and opened businesses.
Answer:any of a number of subatomic particles carrying a fractional electric charge, postulated as building blocks of the hadrons. Quarks have not been directly observed but theoretical predictions based on their existence have been confirmed experimentally
Explanation:
Reviewing information on majors such as its introductory courses, required courses, and office location is described as conducting preliminary research.
Research that is preliminary is research whose findings are not conclusive and whose information needs to be confirmed. This type of study is typically done to learn more about a specific subject and to gauge the amount of material that is available.
Selecting an intriguing topic is necessary for conducting preliminary research. Developing a research question requires gathering sufficient background knowledge about the subject. As a result, the researcher may concentrate on gathering the precise data they need. A preliminary research topic might be elevated to established research if the facts are verified by the results of the subsequent investigation.
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