Elyse Is Interested in Studying Aggression

Elyse is interested in studying aggression. To do so, she decides to look at horn-honking behaviour at stop signs and records the number of times someone honks their car horn before the car in front moves on. In this example, horn-honking is the and the
Number of honks recorded is the _.

A) independent variable; dependent variable
B) dependent variable; independent variable
C) dependent variable; error variance
D) operational definition of aggression; dependent variable
E) controlled variable; measured variable