The Best Way to Insure That the Response Categories Offered

Multiple Choice

The best way to insure that the response categories offered in a fixed-alternative 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.