Which of the Following Would Result in a Movement Along

Which of the following would result in a movement along, but no shift in, the supply curve of grapefruit juice?

A) a decrease in the price of grapefruits due to a bumper crop harvest
B) a report by the U.S. Surgeon General that increased citrus consumption increases the likelihood of lower cholesterol levels, which decreases the risk of heart attacks
C) an increase in wages for workers in all citrus orchards
D) All of the above cause movements along but no shift in the supply curve of grapefruit juice.