Researchers Conducted an Experiment to Determine If Riding a Bike

Multiple Choice

Researchers conducted an experiment to determine if riding a bike to school improves attention span. What are the treatment and outcome variables?

A) The treatment variable is riding a bike to school.The outcome variable is whether or not the child rode a bike to school.
B) The treatment variable is riding a bike to school.The outcome variable is the child's attention span.
C) The treatment variable is attention span.The outcome variable is whether or not the child rode a bike to school.
D) The treatment variable is attention span.The outcome variable is the child's attention span score.