In an Experiment,an Interaction Is Defined As

In an experiment,an interaction is defined as:

A) a pattern of results in which the effect of one independent variable on a dependent variable depends on the level of another independent variable.
B) a statistically significant relationship between an independent variable and a dependent variable.
C) the average difference between two variables.
D) the way in which an experimenter unconsciously biases the results of the experiment by behaving in a certain way toward the participants.