While lecturing on copd, the instructor mentions emphysema. the instructor asks the students, "if the client is a smoker, explain the physiology behind cellular changes occurring in the lung which allow destruction of the alveoli." which students have an accurate response? select all that apply?

Sarah and john are having a discussion on genetic diversity. sarah believes that it happen over a long period of time. john it happens immediately. who is correct? a. sarah is correct because genetic diversity occurs over a long period of time. b. john is correct because genetic diversity occurs immediately. c. both are correct because genetic variation can occur or long period of time. d. neither are correct because genetic diversity occurs over any period of time