. A sample of 400 Regina households is selected and several variables are recorded. Which of the following statements is correct? a) Total household income (in $) is interval level data. b) Socioeconomic status (recorded as "low income", "middle income", or "high income" is nominal level data. c) The number of people living in a household is a discrete variable. d) The primary language spoken in the household is ordinal level data. e) None of the above.