An Elementary School Teacher Is Interested in the Relation Between

Multiple Choice

An elementary school teacher is interested in the relation between sugar consumption and activity level in preschool children.The teacher gives 30 preschool children from Preppy Preschool Playland 0 milligrams, 20 milligrams, or 50 milligrams of sucrose (sugar) in a breakfast drink.She then observes their behavior for 30 minutes during their morning outdoor play period and codes their activity level.In this example, the independent variable is:

A) 30 preschool children.
B) the amount of sucrose.
C) all preschool children.
D) activity level.