Some Sales Managers Are Talking Shop

Some sales managers are talking shop.Which of the following quotations refers to a movement along the demand curve?

A) "Since our competitors raised their prices, our sales have doubled."
B) "It has been an unusually mild winter;our sales of wool scarves are down from last year."
C) "We decided to cut our prices, and the increase in our sales has been remarkable."
D) "The Green movement has sparked an increase in our sales of biodegradable products."
E) None of the above.