The organ system that forms a communication and coordination network throughout all parts of an animal’s body is known as the
(a) digestive system.
(b) respiratory system.
(c) circulatory system.
(d) skeletal system.
(e) nervous system

Aresearcher created three groups based on participants bmi: normal weight, overweight and obese. the hypothesis being tested is that the three groups differ in the mean number of artificially sweetened drinks consumed weekly. which statistical test might the researcher use, assuming a reasonably normal distribution of values.