(Figure: Shift in Demand 2) Use the Figure to Answer

(Figure: Shift in Demand 2) Use the figure to answer the question.
Which of the following market changes would lead to a shift of the demand curve from Old demand to New demand?

A) A report is published noting that the product has adverse health effects.
B) There is a decrease in the price of a substitute product.
C) There is an increase in the number of consumers in the market for the product.
D) There is an improvement in production technology used by sellers.