Which of the Following Is Most Likely to Be the Reason

Multiple Choice

Which of the following is most likely to be the reason behind the inability of advertisers to take advantage of the feedback mechanism provided by social media?

A) Lack of the human element.
B) Use of the centralized network to deliver content.
C) Lack of resources.
D) Predominantly passive nature of consumption.
E) Inability to be labor- and resource-intensive.