In the Chicken-And-Egg Debate Over Whether Emotions Are Caused Primarily

In the chicken-and-egg debate over whether emotions are caused primarily by biology or by cognitions, the conclusion reached by the text is that:

A) biology is the cause of emotion, while cognition is the after-effect.
B) cognition is the cause of emotion, while biology is the after-effect.
C) emotion is a complex interactive chain of events.
D) emotion intensifies over time to the point that the original cause of the emotion is not important to knowing the emotion's eventual end-state.