Answer:
Matt's decision is an example of persistence.
Explanation:
Persistence is a personality trait of a person which helps him to learn or stick to a thing until he gets satisfactory results. A person who is having persistence traits continuously do efforts to achieve their goal despite getting problems, difficulties, failure, and frustration. Persistence shows the determination of a person.
So, in this case, Matt although frustrated by the new process of billing but was determined to learn about the new system so he keeps studying the manual until he fully understood the process. So this Matt's decision shows the example of persistence.
