The first edition hardcover of a new book by a popular writer has a demand which is uniformly distributed between 1 and 2 million. The production and transportation costs per hardcover are $10, and the sale price in bookstores is $25. When the paperback version comes out, the hardcover books go on sale for $5. How many hardcovers should be produced?
A. 1.75 million
B. 1.6 million
C. 1.5 million
D. 1 million