All of the following are possible sources of error in a scientific investigation except for: a- not being able to complete all trials of an experiment b- measuring materials such as mass and volume incorrectly c- having a constant in your experiment d- recording experimental data incorrectly

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