Refer to the Table,which Shows the Number of MP3 Downloads

Multiple Choice

$$\begin{array} { | l | l | } \hline \text { Price } & \begin{array} { l } \text { Quantity } \\\text { Demanded }\end{array} \\\hline \$ 0 & 1,000 \\\hline \$ 1 & 400 \\\hline \$ 2 & 200 \\\hline \$ 3 & 100 \\\hline \$ 4 & 25 \\\hline\end{array}$$ Refer to the table,which shows the number of MP3 downloads demanded per month for the students at a certain university.Which of the following statements does not explain why the quantity demanded was not higher for a price of $0?

A) There are only so many songs that people want to listen to.
B) Downloading an MP3 takes time.
C) MP3s take up space on a computer's hard drive.
D) People would rather pay for their downloads.