Does Exposure to Classical Music (Through Instrument Lessons or Concert

Multiple Choice

Does exposure to classical music (through instrument lessons or concert attendance) improve a child's scholastic performance? In a study, researchers measured the amount of exposure to classical music for a group of children, along with their scores on the state's academic proficiency exam. The explanatory variable in this study is:

A) the type of instrument a child plays.
B) the child's score on the state's proficiency exam.
C) the amount of exposure a child has to classical music.
D) whether a child passed the state's proficiency exam.