Answer:
Answer is D. The two factor theory.
Explanation:
The two factor theory who is also known as dual-factory theory was made known in 1959 by Fredrick Herzberg.
The two factor theory is usually used when there are certain factors , which are two separate factors that explain sequence of event. These factors usually work independently of each other, but one factor causes satisfaction while other causes dissatisfaction.
In this case, Ava sequence of events was explained by the two factor theory,this is possible since Ava can label her emotion because she previously experienced it.