4. Which statement best describes how information is presented in this passage? A. The causes of effects are explained. B. A narrative describes one event in detail. C! An argument is made using supporting evidence. D. A problem is identified, and a solution is suggested.​​

Which statement is correct? the speed of the light ray is the same in air and medium a. the speed of the light ray is the same in air and medium b. medium a and medium b have different densities because light refracts at different angles. medium a and medium b have the same density because the light ray strikes both at the same angle.