In Terms of Most Advertisers Working Through Ad Networks,which of the Following

Multiple Choice

In terms of most advertisers working through ad networks,which of the following statements is false?

A) Such advertising is more difficult to monitor.
B) Each site must be watched for traffic and content.
C) There are problems when trying to calculate costs.
D) Advertisers get only minimum exposure because it does not cover the smaller sites.
E) A few Web masters try to cheat the system by artificially increasing the number of page requests.