DrTanaka Stumbled Across Big Foot in the Woods One Day,and

Dr.Tanaka stumbled across Big Foot in the woods one day,and after some conversation (yes,Big Foot actually spoke English!) ,Big Foot agreed to be studied.Dr.Tanaka gave him all sorts of intelligence tests,personality tests,memory tests,empathy tests,and then observed him in his natural habitat.What type of research method is Dr.Tanaka using?

A) experiment
B) naturalistic observation
C) case study
D) survey