All of the Following Factors Should Be Considered When Determining

All of the following factors should be considered when determining how often people should brush their teeth except one.Which one is this exception?

A) The time it takes for plaque to begin to cause negative gingival changes
B) The ability of an individual to remove plaque at an individual session
C) The social aspects related to clean teeth
D) The individual's current level of gingival health or disease