A Questionnaire Included a Question on Age and Gave the Following

Multiple Choice

A questionnaire included a question on age and gave the following categories respondents could select: 0-10 years old, 10-20 years old, 15-30 years old, 25-40 years old, 35-50 years old, and over 50 years old. What is the problem with this?

A) The categories are not mutually exclusive.
B) The categories are too broad.
C) The last category is too broad and will include too many respondents.
D) The categories are not exhaustive.
E) The categories are not reliable.