Question

amanda plans to investigate how the brain sends messages to the body. she wants to conduct an experiment that measures the reaction time of humans in different situations. she needs to do more research to help her understand and plan her experiment. which reference material would be the best choice to conduct more research?

a report written by a friend
a message board on the internet
the first website that appears in a google search
an interview with a medical doctor

Explanation:

A medical doctor has professional knowledge and expertise in human - body functions and reaction - time related research. A report by a friend may lack scientific rigor, a message board on the Internet may have unreliable information, and the first Google search result may not be a reliable academic source.

Answer:

an interview with a medical doctor