Why do the most popular books and DVDs sell for so much less than the least popular books and DVDs, whereas the opposite is true for cinema tickets? Why do businesses sometimes put 'As seen on TV' in print advertisements and on product packages?

a. Because popular books and DVDs have higher production costs.
b. Due to the demand and supply dynamics in the respective markets.
c. Cinema tickets have higher production costs, leading to higher prices.
d. Marketing strategies aim to attract more customers.