If you are designing options items for this question $"$In the past year, how many times did you witness unethical activities in marketing research practices? which of the following designs is the best

$0,1-5$ times, $6-10$ times, $10-15$ times, more than $15$ times

$0,1-5$ times, $6-9$ times, $10-15$ times, more than $15$ times

Never, Occasionally, Sometimes, Frequently, All the Time

$0,1-50$ times, $51-100$ times, $101-150$ times, more than $150$ times