Which of these is the best reason for nina to monitor her bank account statements online or on her cell phone app? to organize when to pay to bills to determine the exact date she can retire to ensure she's paying her fair share in taxes to know how much money she has for budgeting.

D. to know how much money she has for budgeting

Explanation:

Checking bank accounts or statements allows a person to know how much money they have at that point. This does not represent one's income or property; thus it is not useful for taxes. Additionally, the payment of bills is based on due dates and other factors, not the amount in a certain account. Finally, retirement is a long-term goal and is based on savings and investments. No single date could be ascertained by looking at bank statements. On the other hand, looking at these statements gives allows a person to understand what they can spend at that time and how they should budget.