Which of the Following Questions Should Ad Advertiser Address When

Multiple Choice

Which of the following questions should ad advertiser address when deciding whether or not to use a comparative advertisement? 

A)  How do comparative and noncomparative advertisements match up in terms of impact on brand awareness, consumer comprehension of ad claims, and credibility? 
B)  Do comparative and noncomparative ads differ with regards to effects on brand preferences, buying intentions, and purchase behavior? 
C)  How do factors such as consumer brand preference and the advertiser's market share influence the effectiveness of comparative advertising? 
D)  Under what specific circumstances should an advertiser use comparative advertising? 
E)  All of these are correct.