Take a look at the passage again:
To save enough money to pay tuition, Tanisha keeps a strict budget.
She never carries more than three dollars in her
wallet. To avoid making impulse purchases like a pizza or CD that
will cause her to come up short when registration begins.
You chose the second part, She never carries more than three dollars in her wallet. This part has a main clause: She is the subject; carries is the verb. A fragment will not have a main clause.
Go back to the passage to try again.