A new service for your e-reader allows you to download electronic versions of books according to the following pricing.
Which of the following is an expression for the total cost of an order if you purchase e educational books, f classic books, and g new releases?
A. 2(2e + 4f + 10g)
B. 80(e + f + g)
C. 2(2e + 2f + 5g)
D. 2(e + 2f + 5g)