【单选题】You love peanut butter. You hear on the news that 50 % of the peanut crop in the South has been wiped out, which will cause the price to double by the end of the year. As a result,
A.
your demand for peanut butter will increase by the end of the year.
B.
your demand for peanut butter increases today.
C.
your demand for peanut butter falls as you look for a substitute good.