GMAT Critical Reasoning (CR) | Re: Josh: DVD rentals nationwide together handled 10 million

Josh : People are renting fewer DVD's because probably it's cheaper to buy them as oppose to renting them.
Maxwell: The above argument is wrong because only 4 million DVD's were sold as compared to 10 million fewer DVD rentals.

So in order to weaken Max's claim, we have to show that buying DVD's cheaper did hurt the rental business.

Now look at answer choices:
A) In 2012 Webflix rented out more DVDs than it sold. // well this doesn't account for fewer