A train operated by the company Trains $"$r$"$ us crashes, severely injuring $11$ passengers. One of those passengers who was severely injured, Bill, files a class action lawsuit on behalf of the injured passengers, alleging negligence on the part of Trains $"$r$"$ us that led to the accident. Bill hires a competent attorney who has class action experience to handle the litigation. The defendant moves to dismiss the class action complaint, arguing that this case is not appropriate for class action litigation. Is the defendant correct? explain