Which of the Following Statements About Postcampaign Evaluation Is True

Which of the following statements about postcampaign evaluation is true?

A) Evaluating an advertising campaign can be the most demanding task facing advertisers.
B) Testing ad effectiveness can be done either before or after the campaign.
C) Most advertising campaigns aim to create an image for the product instead of asking for action.
D) Even if an ad campaign has been particularly successful,advertisers will typically conduct a postcampaign evaluation.
E) All of the above statements about postcampaign evaluation are true.