Which Statement Is Correct Regarding Retirement Living Expenses

Which statement is correct regarding retirement living expenses?

A) It is impossible to estimate your spending needs.
B) Your spending patterns will probably not change.
C) You'll use a smaller share of your income for food,housing,and medical care than non-retired families.
D) The exact amount of money you'll need is impossible to predict.
E) Work-related expenses,such as driving back and forth to work,tend to be higher during retirement.