Which one of the following instructions to the research subject will provide the highest possible level of measurement? a. Do you work full time? Yes__ No__ Unsure__Decline to answer__ b. What was your total number of hours you worked last week? Enter number: _____ c. How many hours do you work each week: < 10__ 10-20__ 21-30 __ 31-40 __more than 40 __? d. Indicate whether you work full time: yes___ no___