[Solved] Which of the following statements is false concerning hematuria? A) It may not be visible to the naked eye. B) It may be present normally after long-distance events. C) It can only be detected through a urinalysis. D) It may be present normally due to menstruation. Firsthand Data: Information collected directly by the researcher or observer, without being mediated by other sources. Economically: Pertains to the manner in which resources are used and managed in the production, distribution, and consumption of goods and services. Fujita-Pearson Scale: A scale for classifying the intensity of tornadoes based on their wind speed and the damage they cause. Documented: Information or events that have been recorded, written down, or otherwise preserved as evidence.