According to the Textbook,which of the Following Is Not a Reason

According to the textbook,which of the following is not a reason for the increasing number of disabled persons in Canada?

A) Due to advances in medicine,more people who are injured in accidents are likely to survive than they were in the past.
B) As Canada's population ages,more citizens are likely to experience chronic diseases that cause disability.
C) Children born with a serious disability today are more likely to survive.
D) Society has begun to label people as "disabled" who would not have been considered disabled in the past.