It comes from Lake Ticlla Cocha.
Professor Rashad is using a longitudinal research design.
This research design involves periodically collecting data from the same participants of a study over a long period of time. Longitudinal studies are useful when investigating certain phenomena (such as cognitive development) and comparing their developments during different stages or time periods in a participant's lifespan .
Look it up on social studies.com
I would use D. Fact. Its about scientists so I would use some facts about them..
