Simply Put, in Marketing Experiments, the Independent Variable Is the __________

Simply put, in marketing experiments, the independent variable is the __________ and the dependent variable is/are the __________.

A) cause of an action; effect of an action
B) outcome; factor beyond the experimenter's control
C) effect of an action; cause of an action
D) element that never changes; the element that always changes
E) element that always changes; the element that never changes