The answer is C: it doesn't support multi-user environments
This question is highly subjective. Some might agree while others might argue differently. When we talk about “enterprise”, all I think is IT devices that are suited to the needs of the business. Well, in my honest opinion, an iPad does not fit into the enterprise because it doesn't support multi-user environments. It lacks common productivity tools used in today’s enterprise world and cannot replace windows and android platforms in a 'one size fits all' kind of enterprise environment.