Holding All Other Forces Constant,when the Price of Gasoline Rises,why

Multiple Choice

Holding all other forces constant,when the price of gasoline rises,why would the number of litres of gasoline demanded fall substantially over a 10-year period

A) Buyers tend to be much less sensitive to a change in price when given more time to react.
B) Buyers will have substantially more income over a ten-year period.
C) Buyers tend to be much more sensitive to a change in price when given more time to react.
D) Gasoline has no substitutes.