Answer:
Larina's experience best illustrates overconfidence.
Step-by-step explanation:
Confidence is an individual's belief that he/she can have faith in something or someone.
Overconfidence is having an excessive confidence, which can often be negative.
In this case, we can see Larina is being overconfident, thinking she will never eat any junk food by the vending machines even though she does in the end.