The Best Way to Insure That the Response Categories Offered

Multiple Choice

The best way to insure that the response categories offered in a multichotomous question are exhaustive is to

A) provide an "other" category.
B) provide a space for respondents to write in their answer,such as "e.____."
C) use at least ten categories.
D) use at least fifteen categories.
E) do extensive prior research before formulating the response categories.