As you grow older, which of these might make you change you your personal finance decisions more

1. Changes in your income

2. Changes in your family size
3. Changes in your lifestyle

All of the above can potentially affect your personal finance decisions. Changes in your income can affect your ability to save and invest, changes in your family size can affect your budget and spending priorities, and changes in your lifestyle can affect your spending habits.

I agree, all the answers provided are correct. However, if you were only allowed to choose one, your answer would be YOUR FAMILY PRIORITIES. To inform the ones that indicate that I'm yelling at them due to the use of capital letters, no, I am generally wanting to help the people in need of the answer. :)