A Researcher Wants to Study the Effect of Death Anxiety

A researcher wants to study the effect of death anxiety on prejudice.The researcher manipulates a person's level of death anxiety by showing some participants footage of a gruesome car accident.In this study,footage of the car wreck is the _____ and death anxiety is the _____.

A) independent variable;dependent variable
B) dependent variable;independent variable
C) abstract conceptual variable;operational definition
D) operational definition;abstract conceptual variable