[Solved] Because of the free-rider problem, respondents to cost-benefit surveys: A)are unable to evaluate the effect of the project on their personal satisfaction. B)are typically not benefited directly by government projects C)have a difficult time identifying explicit costs D)have little incentive to tell the truth Sputum Specimen: A sample of mucus coughed up from the lungs, collected for laboratory analysis to help diagnose respiratory diseases. Surgical Incision: A cut made through the skin and tissues during surgery to gain access to the area being operated on. Occult Blood: Refers to the presence of blood in the feces that is not visible to the naked eye, usually detected by chemical tests. Menstrual Cycle: The regular natural change that occurs in the female reproductive system, marking the preparation for potential pregnancy.