Which of the Following Explains Why the Price of a Product

Multiple Choice

Which of the following explains why the price of a product might rise from one year to the next?
(i) an increase in quality
(ii) industry pricing trends
(iii) increased costs of production
(iv) an increase in demand for the product

A) (iii) only
B) (iii) and (iv)
C) (i) , (iii) , and (iv)
D) (i) , (ii) , (iii) , and (iv)