Answer:
Pay off her credit card debt.
Step-by-step explanation:
A credit score is indicative of one's history of loan repayments. A high credit score communicates that the borrower has been timely in paying their loans. It tells that an individual has been responsible when using credit facilities.
A low credit score says that the customer is often late in repaying their loans. If Jill wants to improve his credit score, he should clear all his outstanding debts.