One Disadvantage of Using the Internet as an Advertising Medium

One disadvantage of using the Internet as an advertising medium is

A) as a relatively new medium,it has attracted limited use.
B) pay-per-click search ads on Google are expensive and ineffective.
C) it is difficult to translate messages that can be used in social media networks like Facebook and Twitter.
D) it often creates more traffic than a firm can actually handle.
E) an animation or video can require a long download time due to their files size.