A Psychologist Believes That Music Affects a Person's Mood

Multiple Choice

A psychologist believes that music affects a person's mood.Some participants listen to waltzes and others listen to military marches.Each participant's mood is measured with a paper-and-pencil test.What are the independent and dependent variables?

A) The waltz music is the independent variable and the military march music is the dependent variable.
B) The type of music is the independent variable and the participant's mood is the dependent variable.
C) The participant's mood is the independent variable and the type of music is the dependent variable.
D) The participant's mood is the independent variable and the scores on the paper-and-pencil test are the dependent variable.